# Worksheet: Calculating Reaction Quotients from Pressures

Q1:

Sodium sulfate decahydrate, , dehydrates according to the equation In the equilibrium constant , partial pressures are defined relative to a standard pressure of 1 atm. Calculate the partial pressure of water vapor at equilibrium with a mixture of and at .

• A 24.4 atm
• B atm
• C atm
• D atm
• ENot enough information has been provided.

Q2:

A sample of ammonium chloride was heated in a closed container. Ammonium chloride thermally decomposes according to the equation: At equilibrium, the pressure of was found to be 1.75 atm. Using a standard gas pressure of 1.00 atm, calculate the value of the equilibrium constant for the decomposition at this temperature.

Q3:

Nitric oxide and chlorine react reversibly to form nitrosyl chloride according to the following equation: In a gas mixture at equilibrium, the partial pressures of , and are 0.050 atm, 0.30 atm and 1.2 atm, respectively. Using a standard gas pressure of 1.0 atm, calculate the equilibrium constant for this reaction.

• A80
• B96
• C
• D
• E