Problem: Consider the following system at equilibrium at 25°C: PCl3(g) + Cl2(g) <=> PCl5(g) for which ∆G° = -92.50 kJ. What will happen to the ratio of partial pressure of PCl5 to partial pressure of Cl2 as the temperature is raised?a. increasesb. decreasesc. not affected

FREE Expert Solution

Use the Gibbs-Free energy- Keq equation and determine the relationship of temperature with the ratio of partial pressure of PCl5 and Cl2

Recall that Keq is similar to the ratio of PCl5-Cl2, recall that Keq can be written as:

Keq = PproductsPreactants=PPCl5PCl2 ×PCl3

Thus, as Keq increases, the ratio of PCl5-Clalso increases.

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Problem Details

Consider the following system at equilibrium at 25°C: PCl3(g) + Cl2(g) <=> PCl5(g) for which ∆G° = -92.50 kJ. What will happen to the ratio of partial pressure of PCl5 to partial pressure of Cl2 as the temperature is raised?

a. increases

b. decreases

c. not affected

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