Consider the reaction X 2 (g) 2 X(g). When a vessel initially containing 755 torr of

Question:

Consider the reaction X₂(g) → 2 X(g). When a vessel initially containing 755 torr of X₂ comes to equilibrium at 298 K, the equilibrium partial pressure of X is 103 torr. The same reaction is repeated with an initial partial pressure of 748 torr of X₂ at 755 K; the equilibrium partial pressure of X is 532 torr. Find ΔH° for the reaction.

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