C3h6 (g) + 9/2 o2 (g) ---> 3 co2 (g) + 3 h2 o (l) using the standard enthalpies of formation ________________________________________________________
Answers
The standard enthalpy of the reaction for the given equation is -863.2 kJ/mol.
The standard enthalpy of the reaction can be calculated by subtracting the sum of the standard enthalpies of the formation of the reactants from the sum of the standard enthalpies of the formation of the products:
ΔH°rxn = ΣnΔH°f(products) - ΣmΔH°f(reactants)
where n and m are the coefficients in the balanced chemical equation, and ΔH°f is the standard enthalpy of formation.
The standard enthalpy of formation for H₂S(g), H₂O(l), and SO₂(g) can be found in tables as follows:
ΔH°f(H₂S(g)) = -20.2 kJ/mol
ΔH°f(H₂O(l)) = -285.8 kJ/mol
ΔH°f(SO₂(g)) = -296.8 kJ/mol
O₂(g) is an elemental form and has a standard enthalpy of formation of 0 kJ/mol.
Using these values and the balanced chemical equation, we can calculate the standard enthalpy of the reaction:
ΔH°rxn = [2(-285.8 kJ/mol) + 2(-296.8 kJ/mol)] - [2(-20.2 kJ/mol) + 3(0 kJ/mol)]
= -863.2 kJ/mol
Therefore, the standard enthalpy of the reaction for the given equation is -863.2 kJ/mol.
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The complete question-
Use standard enthalpies of formation to calculate the standard enthalpy of reaction for the following reaction:
2 H₂S(g) + 3 O₂(g) → 2 H₂O(l) + 2 SO₂(g) ΔH°rxn
Related Questions
4.50 L of gas has a gas pressure of 760 mmHg; what should be the new volume be at 200 mmHg
Answers
Answer:
17.1L
Explanation:
P1V1=P2V2 (Boyle's law)
760×4.5=200×V2
V2=760×4.5/200
V2=17.1L
N.B:if pressure reduces volume increases and vice visa
The answer is 17.1 L.
What is Boyle's law in simple terms?
The volume of a gas at constant temperature varies inversely with the pressure exerted on it.
P1V1 = P2V2 (Boyle's law)
760 × 4.5 = 200 × V2
V2 = 760 × 4.5/200
V2 = 17.1 L
What is an example of Boyle's Law?An example of Boyle's law in action can be seen in a balloon. Air is blown into the balloon; the pressure of that air pushes on the rubber, making the balloon expand. If one end of the balloon is squeezed, making the volume smaller, the pressure inside increases, making the un-squeezed part of the balloon expand out.
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Briefly explain the importance of ATP and its role in a cell.
Answers
Answer:
n energy-carrying molecule found in all living things' cells. ATP absorbs chemical energy from the breakdown of food molecules and uses it to power other cellular processes.
Explanation:
Hope it helps
ATP is a crucial energy molecule in cells, providing energy for various cellular processes.
ATP, or adenosine triphosphate, is often referred to as the "energy currency" of the cell. It plays a vital role in cellular metabolism by providing energy for various processes. ATP is composed of adenosine and three phosphate groups. The energy stored in ATP is released when the terminal phosphate group is hydrolyzed, forming ADP (adenosine diphosphate) and inorganic phosphate (Pi).
The role of ATP in a cell is multifaceted. Firstly, ATP powers cellular work by providing the energy needed for chemical reactions, such as biosynthesis, active transport, and muscle contraction. It acts as an immediate source of energy that can be rapidly used by the cell.
Secondly, ATP participates in signal transduction and cellular communication. It can be hydrolyzed to ADP and Pi, releasing energy that can activate signaling molecules and enzymes involved in cell signaling pathways.
Furthermore, ATP is involved in maintaining cell homeostasis. It provides energy for processes like ion pumps that maintain the electrochemical gradients across the cell membrane, allowing cells to regulate their internal environment.
Overall, ATP is crucial for the functioning of cells as it serves as an energy carrier, facilitating energy transfer and powering various cellular processes essential for growth, metabolism, and cell survival.
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A cylinder contains 28.5 L of oxygen gas at a pressure of 1.8 atm and a temperature of 298 K. How much gas (in moles) is in the cylinder
Answers
To solve this problem, we can use the Ideal Gas Law equation: PV = nRT. Where P is pressure, V is volume, n is the number of moles of gas, R is the gas constant, and T is temperature. First, we need to convert the given volume of 28.5 L to liters per mole (L/mol) by dividing by the molar volume of an ideal gas at standard temperature and pressure (STP), which is 22.4 L/mol.
Given:
P = 1.8 atm
V = 28.5 L (convert to liters if needed)
T = 298 K
R = 0.0821 L·atm/mol·K (ideal gas constant)
Step 1: Rearrange the Ideal Gas Law equation to solve for n: n = PV/RT
Step 2: Plug the given values into the equation: n = (1.8 atm × 28.5 L) / (0.0821 L·atm/mol·K × 298 K)
Step 3: Calculate the number of moles: n ≈ 2.18 moles
Therefore, there are approximately 2.18 moles of oxygen gas in the cylinder.
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The temperature of the areas surrounding Farmington before Storm 1 and before Storm 2 was about 8°C, and there was the same amount of water vapor in the air.
Storm 1 had more rainfall than Storm 2.
Answers
Answer:
Explanation:
The conditions before Storm 1 were likely more conducive to rainfall due to higher temperatures and higher levels of atmospheric moisture. Warmer temperatures allow the air to hold more moisture, which can lead to an increase in rainfall. Additionally, higher levels of atmospheric moisture increase the chances of rainfall, as the droplets of water vapor in the air are able to coalesce and form larger drops. These larger drops are more likely to reach the ground as rain.
the neutralization reaction gets its name from.the fact that the products of the reaction are
Answers
Answer:
Neutral
Explanation:
Neutralization reaction gets its name from the fact that the products of the reaction are _____.
neutral
Write the net cell equation for the electrochemical cell. Phases are optional. Do not include the concentrations.
Cu(s)∣∣Cu2+(aq,0.0155 M)∥∥Ag+(aq,3.50 M)∣∣Ag(s)Cu(s)|Cu2+(aq,0.0155 M)‖Ag+(aq,3.50 M)|Ag(s)
net cell equation:
Calculate E∘cellEcell° and EcellEcell at 25 °C25 °C, using standard potentials as needed.
Answers
The concentrations, we can't calculate the exact value of Ecell. However, we have found E°cell, which is 0.46 V.
Hi! To write the net cell equation for the given electrochemical cell, we need to consider the half-reactions occurring at the electrodes.
The half-reactions are:
Cu(s) → Cu²⁺(aq) + 2e⁻ (oxidation at anode)
Ag⁺(aq) + e⁻ → Ag(s) (reduction at cathode)
Now, we can combine the half-reactions to get the net cell equation:
Cu(s) + 2Ag⁺(aq) → Cu²⁺(aq) + 2Ag(s)
For calculating E°cell and Ecell at 25°C, we need the standard reduction potentials (E°) of both half-reactions:
E°(Cu²⁺/Cu) = +0.34 V
E°(Ag⁺/Ag) = +0.80 V
E°cell = E°(cathode) - E°(anode) = E°(Ag⁺/Ag) - E°(Cu²⁺/Cu) = 0.80 V - 0.34 V = 0.46 V
To calculate Ecell, we can use the Nernst equation:
Ecell = E°cell - (RT/nF) * lnQ
At 25°C, R = 8.314 J/(mol·K), T = 298 K, F = 96485 C/mol, and n = 2 (number of electrons transferred in the reaction). The reaction quotient (Q) is:
Q = [Cu²⁺]/[Ag⁺]²
Since we're not supposed to include the concentrations, we can't calculate the exact value of Ecell. However, we have found E°cell, which is 0.46 V.
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1. The modern periodic table organizes the elements based on?
Answers
Answer:
By element with the lowest atomic number to the highest atomic number.
Explanation:
can someone please help me i don't know these question bc my family celebrates thanksgiving differently. plz and thank you :3
Easy: How many turkeys are consumed on Thanksgiving day in America?
Medium: How long did the first Thanksgiving Celebration last?
Hard: When was the first NFL football game on Thanksgiving?
Fun: Who was the first president to pardon a turkey?
Answers
Answer:
Easy 46 million turkeys
Medium three days
Hard: 1934
Fun: The first President on record issuing a "pardon" to his turkey was Ronald Reagan.
Explanation:
hop tis helped
PLEASE HELP 10 POINTS
Which of the following is a
reasonable ground-state electron configuration?
1s21p5
1s22s22p8
1s22s22d4
1s22s22p6
Answers
The reasonable ground - state electron configuration is 1s² 2s²2p⁶
1) Electron configuration is defined as the arrangement of electron in the atomic orbtials.
2)The ground state electron configuration is lowest energy level and have most stable arrangement.
3) An excited state configuration is a higher energy level.
4) According to Aufbau principle ., electrons will occupy the orbitals of lower energies first then occupying higher energy orbitals.
5) Energy of orbitals is calculated by the sum of principle quantum number and azimuthal quantum numbers.
6) The rule of electron filling in the orbital is from lower energy level to higher energy level.
7) According to this rule electrons are filled in the order of 1s 2s 2p 3s 3p 4s 3d 4p 5s ........and so on.
8) According to pauli principle , maximum two electrons, having opposite spin can fit in orbital.
9) According to Hund's rule , orbital in given sub-shell is singly occupied by electrons before filling second electron in an orbital.
10) The ground state configuration is the arrangement of electron around the nucleus of an atom with lower energy levels.
Hence,The reasonable ground-state electron configuration is 1s² 2s² 2p⁶
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How many straight-chains alkynes have the molecular formula C7H12?
Answers
The molecular formula C7H12, there are three straight-chains alkynes isomers
What are isomers?The term isomers refers to compounds that have the same molecular formula but different structural formulas. This implies that the orientation of the molecules in space tend to differ.
We know that alkynes are those compounds that contain a triple bond. This triple bond could occur at any point in the molecule. Sometimes, the isomerism may result from the position of the triple bond on the compound.
Now for the compound that has the molecular formula C7H12, there are three straight-chains alkynes isomers as we can see in the image attached to this answer.
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PLZZZZZ HELPP How do you predict the bond length and energy would change if hydrogen formed a bond with Astatine (At)?
Answers
The bond length and energy of the bond formed between hydrogen (H) and astatine (At) would change if the bond order increases or decreases or when its potential energy is at the lowest.
What is bond length?Bond length is also referred to as bond distance and it can be defined as an equilibrium distance between the nuclei of two (2) covalently bonded atoms in a molecule.
What is bond energy?Bond energy can be defined as the amount of chemical energy that is required to break one mole of a given chemical bond.
In Chemistry, the bond length and energy of a molecule is typically determined by the following:
The bond order or number of bonded electrons.The potential energy possessed by the molecule.In conclusion, you can predict that the bond length and energy of the bond formed between hydrogen (H) and astatine (At) would change if the bond order increases or decreases or when its potential energy is at the lowest.
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which substance contains elements, chemically combined in a fixed proportion
Answers
The substance that contains elements chemically combined in a fixed proportion is called a compound.
In a compound, the elements are bonded together through chemical bonds such as ionic bonds, covalent bonds, or metallic bonds. The atoms in a compound are arranged in a specific and predictable manner, forming a unique chemical formula that represents the elemental composition of the compound.
For example, water (H2O) is a compound composed of two hydrogen atoms (H) and one oxygen atom (O). The ratio of hydrogen to oxygen in water is always 2:1. Regardless of the source or method of production, the ratio of hydrogen to oxygen atoms in water remains constant.
Similarly, sodium chloride (NaCl) is a compound made up of one sodium atom (Na) and one chlorine atom (Cl). The ratio of sodium to chlorine in sodium chloride is always 1:1.
The fixed proportion of elements in a compound is a fundamental characteristic of chemical compounds and is a result of the specific arrangement and bonding of the atoms within the compound. This fixed proportion allows compounds to have unique properties and behaviors that differ from those of the individual elements composing them.
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Graphing data can help you to recognize
Answers
Answer:
Graphing data can help you to recognize changes in what your doing.
Explanation:
Answer:
Explanation:
To identify trends, make predictions, and recognize anomalous data. Helps you understand what your data means or a picture of your graph. A graph wich the points form a straight line.
Silicon carbide, SiC (m.w. = 40.10 g/mol), is used as an abrasive for many industrial processes. If you want to produce 1.00 kg of silicon carbide from the reaction of SiO2 (m.w. = 60.08 g/mol) and carbon (m.w. = 12.011 g/mol), what is the minimum amount of SiO2 that is needed?SiO2(s) + 3C(s) → SiC(s) + 2CO(g)
Answers
It is needed 1498.25 g of SiO2.
- From the chemical equation, we know that to produce 40.10 g of SiC, it is needed 60.08 g of SiO2 and 36.033 g of C (because in the reaction there are 3 moles of C).
- Calculating we obtain that:
\(\frac{1000\text{ . 60.08 }}{40.10}=1498.25\text{ g}\)So, it is needed 1498.25 g of SiO2. This can be expressed as 1.50x10^3 g.
How many atoms thick is graphene?
Answers
One atom thick film of carbon known as graphene is 200 times stronger than steel and one hundred times thinner than a sheet of paper.
How thick is a graphene atom?1 atom thick
Pure carbon atoms are arranged in a hexagonal lattice in a single layer to form graphene, which is held together by sp2 bonds. Graphite is composed of layers of graphene. The thinnest material known to exist is graphene, which measures one atom thick (0.345Nm). Actually, it is two-dimensional.
A hexagonal honeycomb lattice securely holds a single layer (monolayer) of carbon atoms together to form graphene. It is an allotrope of carbon with sp2-bonded atoms arranged in a plane and a molecular bond length of 0.142 nanometers.
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I WILL GIVE YOU BRAINLIEST!!!
Answers
Answer:
The second option
Answer:
Intent to cause harm
A sample of gas has a pressure of 517.1 kPa. Determine the new pressure of the gas if the volume is increased by a factor of 2.3.
Answers
The pressure change of a system can be determined from the change in volume using Boyle's law. The new pressure of the system if the volume is increased by a factor of 2.3 is 224.8 kPa.
What is Boyle's law?According Boyle's law the volume of a system is inversely proportional to the pressure of the system thus PV = constant . Thus as pressure increases volume will decrease.
If p1 and v1 be the initial pressure and initial volume respectively and p2,v2 be the final quantities, then the we have the relation,
p1v1 = p2v2.
Here the initial pressure is 517.1 kPa and volume increases by a factor of 2.3 therefore, v2 = 2.3 V1. Now, the final pressure p2 is calculated as follows:
517.1 kPa × v1 = p2 × 2.3 v1
P2 = (517.1 kPa × v1 l)/2.3 v1 l
= 517.1 kPa / 2.3
= 224.8 kPa
Therefore, the new pressure of the system if the volume is increased by a factor of 2.3 is 224.8 kPa.
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what are two ways in which minerals can form from a solution? read more >>
Answers
Evaporation and crystallization are two common processes by which minerals form from a solution. Here option C is the correct answer.
When a solution containing dissolved minerals is left undisturbed, the water content of the solution gradually decreases through evaporation. As the water evaporates, the concentration of dissolved minerals increases, eventually reaching a point where the solution becomes supersaturated.
At this stage, the excess minerals start to come together and form solid crystals. This process is known as crystallization. Evaporation and crystallization commonly occur in environments with high rates of evaporation, such as hot and arid regions or shallow bodies of water.
Examples of minerals formed through evaporation and crystallization include halite (rock salt), gypsum, and borax. These minerals often precipitate and accumulate in layers, forming distinctive sedimentary deposits.
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Complete question:
Which of the following are two ways in which minerals can form from a solution?
A) Sublimation and condensation
B) Fusion and solidification
C) Evaporation and crystallization
D) Oxidation and reduction
Drag each tile to the correct image.
Match each alkane name with its structure.
octane
decane
propane
butane
heptane
CHE
IGH
CHE
Reset
Next
Answers
Answer:
The first one is Propane
The second one is HEPTANE
The third one is octane
The 4th is butane
the 5th is decane
The structures have been named according to IUPAC as \(\rm C_3H_8\) Propane, \(\rm C_7H_{16}\) Heptane, \(\rm C_8H_{18}\) Octane, \(\rm C_4H_{10}\) Butane, and \(\rm C_{10}H_{22}\) Decane.
The images has been the representation of the ball and stick structure of the compounds. The central balls have been the representation of the carbon atom , with small balls attached to the sticks have been the representation of the hydrogen attached.
The following structures has been given as:
The structure has 3 carbon atoms with the presence of 8 hydrogen. The molecular formula has been \(\rm C_3H_8\). It has been the structure of propane.The structure has 7 carbon and 16 hydrogen. The structure has been the representation of heptane with molecular formula \(\rm C_7H_{16}\).The structure has molecular formula \(\rm C_8H_{18}\) with 8 carbon and 18 hydrogen. It has been named Octane, according to IUPAC.The structure with 4 carbon and 10 hydrogen with molecular formula \(\rm C_4H_{10}\) has been named according to IUPAC as butane.The structure with molecular formula \(\rm C_{10}H_{22}\) has presence of 10 carbon and 22 hydrogen. It has been named as Decane.The structures have been named according to IUPAC as \(\rm C_3H_8\) Propane, \(\rm C_7H_{16}\) Heptane, \(\rm C_8H_{18}\) Octane, \(\rm C_4H_{10}\) Butane, and \(\rm C_{10}H_{22}\) Decane.
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What properties do atoms of the same element share? Select all that apply
atomic number
chemical reactivity
melting point
Answers
Answer: your answer is A
Explanation: the atoms has the same properties of the same element as the atomic number.
Calculate the molar mass of ammonium chloride
Answers
Answer:
53.491 g/mol
Explanation:
Create the chemical compound and find each individual element's molar mass. Lastly, add them up.
calculate the gravitional force in between two object of mass 25kg and 20kg if distance between them is 5m?
Answers
Answer:
Explanation:The equation for this is F = -GmM/R^2 where the minus sign says the force is attractive m is 10 kg, M is 20 kg and R is 5 meters. If you crunch the numbers you get an answer of:
СН2OH - CHOH - СН2ОН
Answers
The melting point of a substance is the same as its _____ point.
evaporation
freezing
boiling
sublimation
Answers
A solution is made by dissolving 22.2 g of glucose, C6H12O6, in 55.3 g of water, H2O. The molality of glucose in this solution is ? m.
Answers
The molality of glucose in the solution is approximately 2.00 mol/kg.
To find the molality of glucose in the solution, we need to calculate the moles of glucose and the mass of water, and then use the molality formula.
Mass of glucose (C6H12O6) = 22.2 g
Mass of water (H2O) = 55.3 g
Molar mass of glucose (C6H12O6) = 180.16 g/mol
Moles of glucose = mass of glucose / molar mass of glucose
Moles of glucose = 22.2 g / 180.16 g/mol
Mass of water (in kg) = mass of water / 1000
Mass of water (in kg) = 55.3 g / 1000 = 0.0553 kg
Molality = moles of solute / mass of solvent (in kg)
Molality = moles of glucose / mass of water (in kg)
Molality = (22.2 g / 180.16 g/mol) / 0.0553 kg
Molality ≈ 2.00 mol/kg
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Please help me the picture is above, I’ll mark as brainliest.
Answers
With what compound will NH3 experience only dispersion intermolecular forces?
A. CH4
B. LiCl
C. CH3Br
D. HOF
E. CH3OH
Answers
LiCl (lithium chloride) is an ionic compound and would not be expected to interact strongly with NH3 through intermolecular forces, The correct answer is A. CH4.
NH3 (ammonia) can experience several intermolecular forces, including dispersion forces, dipole-dipole forces, and hydrogen bonding. However, the strength of these forces depends on the nature of the other molecules present in the system.
Of the compounds given, only CH4 (methane) is nonpolar, meaning it only experiences dispersion forces with other nonpolar molecules. NH3 can also experience dipole-dipole forces with polar molecules, such as CH3Br (methyl bromide) and CH3OH (methanol), and hydrogen bonding with compounds that have a hydrogen atom bonded to a highly electronegative atom, such as HOF (hypofluorous acid) and water.
LiCl (lithium chloride) is an ionic compound and would not be expected to interact strongly with NH3 through intermolecular forces. Therefore, option B is not the correct answer.
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Based on log rules and the way ph is calculated, what is the difference in [oh– ] concentration between point a and point b. 101 105 106 107
Answers
Based on their pOH values, the difference in [OH– ] concentration between point A and point B is 10^6.
What is pH of a substance?The pH is determined by the concentration of Hydrogen ions [H+]. The higher the concentration of H+ ions, the lower the pH of a substance. If the concentration of H+ is greater than OH-, the material is acidic, i.e. the pH value is less than 7
In this case, the formula for this will be:
\(pH= -log[H+]\)
So we have:
\([OH]= 14-1= 10^{-13}\\[OH] = 14-7=10^{-7}\)
Therefore, the difference in [OH– ] concentration between point A and point B is 10^6.
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Answer: 10^6
Explanation: edge2023
Help me plz and need it bad
Answers
Answer:
Explanation: p + ci=pci
h+o=h io
If the [H3O+] of a solution is 1.00 ✕ 10-5 molar, what is its pH?
Answers
The pH of the solution is 5.
What is pH of solution ?
A solution's pH, which measures how acidic it is, is determined by taking the negative logarithm of the concentration of hydrogen ions (H+) at base 10. The concentration of hydronium ions, or [H3O+], is utilized instead because hydrogen ion concentrations are typically relatively low.
The pH can be calculated using the following formula:
pH = -log[H3O+]
Substituting the given value:
pH = -log(1.00 × 10^-5) = -(-5) = 5
Therefore, the pH of the solution is 5.
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