We’re being asked to determine the equilibrium constant (K) at 25 ˚C for the given reaction:
H2(g) + CO2(g) ⇌ CO(g) + H2O(g)
Recall that ΔG˚rxn and K are related to each other:
We can use the following equation to solve for ΔG˚rxn:
We’re given the ΔH˚rxn and ΔS˚rxn of the reaction:
ΔH˚rxn = 41.15 kJ
ΔS˚rxn = 42.35 J/K
For this problem, we need to do the following steps:
Step 1: Use ΔH˚rxn and ΔS˚rxn to calculate for ΔG˚rxn.
Step 2: Calculate for K.
Given the thermodynamic data below, calculate the value of the equilibrium constant for the reaction shown at 25.0º C.
H2 (g) + CO2 (g) ⇌ CO (g) + H2O (g)
Δ Hº = 41.15 kJ
Δ Sº = 42.35 J/K
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