Calculate the equilibrium constant for the decomposition of water 2H₂O(l) $\rarr$ 2H₂(g) + O₂(g)
At 25°C, given that $\Delta$ G°_f(H₂O(l) ) = -237.2 kJ/mol.

Question

Calculate the equilibrium constant for the decomposition of water 2H₂O(l) $\rarr$ 2H₂(g)+ O₂(g) At 25°C, given that $\Delta$G°_f(H₂O(l))= -237.2 kJ/mol.

Quizplus · Accepted Answer

The equilibrium constant can be calculated using the relation $\Delta G° = -RT \ln K$. Given $\Delta G° = 2 \times (-237.2 \text{ kJ/mol})$, R = 8.314 J/mol·K, and T = 298 K, solving for K gives a very small value, indicating a large positive $\Delta G°$, which corresponds to choice B.

Calculate the Equilibrium Constant for the Decomposition of Water 2H2O(l) →\rarr→

Calculate the Equilibrium Constant for the Decomposition of Water 2H₂O(l) $\rarr$