Determine the standard Gibbs energy change of reaction at 325 K for the following gas-phase transformation:
P = 1 bar
The partial pressure at equilibrium due to component A is equal to 0.15 bar.
Relate equilibrium constant to partial pressures of each compound:
Assume the fugacity coefficients are both 1 (ideal gas condition).
By definition mole fraction is equal to partial pressure divided by total pressure.
Since the reference pressure and total pressure are each equal to 1 bar, the equilibrium expressions simplifies to:
Evaluate equilibrium constant for the reaction:
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