The conversion of methane into products that contain two or more carbon atom, such as ethane, C2H2, is a very important industrial chemical process. In principle, methane can be converted directly into ethane and hydrogen.
(1) 2CH4(g) 
C2H6(g) +
H2(g)
In practice, however, this reaction is carried out in the presence of oxygen:
(2) 2CH4(g) + 1/2 O2(g) C2H6(g) +
H2O(g)
a) Using the thermodynamic data at 298K, determine ΔG° for each reaction.
| ΔGf° (kJ/mol) | ΔGf° (kJ/mol) | ||
| CH4(g) | H2(g) | 0 | |
| C2H6(g) | H2O(g) | -228.57 | |
| O2 | 0 |
ΔG°(1)= ΔG°(2)=
b) Determine the equilibrium constant Kp for each reaction.
Kp(1)=. Kp(2)=
c) Using the info provided, what is the change in free energy ΔG° at 298K for the reaction
H2(g) + 1/2 O2(g) H2O(g)
Does this reaction favor the products or the reactants?
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The conversion of methane into products that contain two or more
carbon atom, such as ethane,...
1. 1.00 mole of gaseous methane was put into a 1.0L flask ad 483K. The equilibrium...
1. 1.00 mole of gaseous methane was put into a 1.0L flask ad
483K. The equilibrium mixture as depicted below was found. The
equilibrium constant, KC, is
CO(g) + 2H2(g)
CH3OH(g)
a) will be greater than 1 since products are favored
b) will be less than 1 since reactants are favored
c) neither statement above is correct because there are equal
amounts of reactants and products
2. For the reaction given below, the diagram represents an
equilibrium mixture. Calculate the...
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1.) The value of S° for the oxidation of carbon to carbon dioxide, is __________ J/K...
1.) The value of
S° for the oxidation of carbon to carbon dioxide,
is __________ J/K
mol. The combustion of carbon, as in charcoal briquettes, in the
presence of abundant oxygen produces carbon dioxide.
2.)The value of
S° for the reaction
is __________ J/K.
3.)The value of
S° for the decomposition of gaseous sulfur dioxide to solid
elemental sulfur and gaseous oxygen,
is __________ J/K
mol.
Use the table below to answer the questions that follow. Thermodynamic Quantities for Selected...
A fuel gas that contains mole% methane and the balance ethane is burned completely with pure...
A fuel gas that contains
mole% methane and the balance ethane is burned completely with
pure oxygen at
°C, and the products are cooled to
°C.
Suppose that the reactor is continuous. Take a basis of
calculation of
mol/s of the fuel gas, assume some value for the percent excess
oxygen fed to the reactor (the value you choose is not going to
affect the results), and calculate -Q⋅ (kW), the rate at which heat
must be transferred from the...
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A fuel gas that contains
mole% methane and the balance ethane is burned completely with
pure oxygen at
°C, and the products are cooled to
°C.
suppose that the combustion takes place in a constant-volume
batch reactor. Take
mol as a basis of calculation of the fuel gas charged into the
reactor and assume any percent excess oxygen,
and calculate –Q(kJ) for the cases of liquid water as
well as water vapor as products.
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rxn for the below combustion reaction, determine if
entropy increases or decreases. Assume 1 mol of substance at 25
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3CO2(g) + 4H2O(l)
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Delta G of O2 = 0 kj/mol
Delta G of CO2 = -394.36 kj/mol
Delta G of H2O = -237.1 kj/mol
We were unable to transcribe this imageWe were unable to transcribe this image
1. 1.00 mole of gaseous methane was put into a 1.0L flask ad
483K. The equilibrium mixture as depicted below was found. The
equilibrium constant, KC, is
CO(g) + 2H2(g)
CH3OH(g)
a) will be greater than 1 since products are favored
b) will be less than 1 since reactants are favored
c) neither statement above is correct because there are equal
amounts of reactants and products
2. For the reaction given below, the diagram represents an
equilibrium mixture. Calculate the...
1.) The value of
S° for the oxidation of carbon to carbon dioxide,
is __________ J/K
mol. The combustion of carbon, as in charcoal briquettes, in the
presence of abundant oxygen produces carbon dioxide.
2.)The value of
S° for the reaction
is __________ J/K.
3.)The value of
S° for the decomposition of gaseous sulfur dioxide to solid
elemental sulfur and gaseous oxygen,
is __________ J/K
mol.
Use the table below to answer the questions that follow. Thermodynamic Quantities for Selected...
A fuel gas that contains
mole% methane and the balance ethane is burned completely with
pure oxygen at
°C, and the products are cooled to
°C.
Suppose that the reactor is continuous. Take a basis of
calculation of
mol/s of the fuel gas, assume some value for the percent excess
oxygen fed to the reactor (the value you choose is not going to
affect the results), and calculate -Q⋅ (kW), the rate at which heat
must be transferred from the...
A fuel gas that contains
mole% methane and the balance ethane is burned completely with
pure oxygen at
°C, and the products are cooled to
°C.
suppose that the combustion takes place in a constant-volume
batch reactor. Take
mol as a basis of calculation of the fuel gas charged into the
reactor and assume any percent excess oxygen,
and calculate –Q(kJ) for the cases of liquid water as
well as water vapor as products.
40.00 25.00 We were unable to...
Calculate
rxn for the below combustion reaction, determine if
entropy increases or decreases. Assume 1 mol of substance at 25
Celsius.
C3H8(g) + 5O2(g)
3CO2(g) + 4H2O(l)
Delta G of C3H8 = -23.4 kj/mol
Delta G of O2 = 0 kj/mol
Delta G of CO2 = -394.36 kj/mol
Delta G of H2O = -237.1 kj/mol
We were unable to transcribe this imageWe were unable to transcribe this image
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