Chapter 14, Problem 14.140CP

Interpretation Introduction

Interpretation:

Use the equilibrium concentration of N₂ and the equilibrium constant to calculate the initial concentration of NH₃, which can be used to find the initial amount of moles of NH₃ that was placed in the reaction vessel.

Concept introduction:

• Le Chatelier’s principle states that any system in equilibrium that is subject to change in concentration, temperature, volume or pressure, will adjust itself to account for the changes and will reach a new equilibrium.
• The equilibrium constant for gaseous species is K_p, which is also the ratio of the partial pressures of products and reactants.
• The equilibrium constant using concentrations of species is K_c, which is also the ratio of the concentrations of products and reactants.

To classify:

The initial amount of moles of NH₃.