21 May Chemical Equilibrium
1. In the following reaction: 2NO(g) + H2(g) ⇌ N2O(g) + H2O(g) ΔH° = -22 kJ/mol
in which direction, left or right, will the equilibrium shift if the following changes are made? How will the equilibrium constant Kc change (increase, decrease, or keep same)?
| Disturbance | Shift of equilibrium | Change of Kc |
| NO is added | ||
| H2 is removed | ||
| N2O is added | ||
| Pressure is increased | ||
| Volume is increased | ||
| the system is cooled | ||
| Argon is added at constant volume | ||
| Argon is added at constant pressure | ||
| Catalyst is added |
2. In the following reaction: 2NOCl(g) ⇌ 2NO(g) + Cl2(g), the equilibrium constant Kc = 4.0×10-4.
(a) What is the state of the system if [NOCl] = 2.0 M, [NO] = 0.10 M, and [Cl2] = 0.10 M? (at equilibrium, produce more products, or produce more reactants)
(b) What are the equilibrium concentrations of NOCl, NO, and Cl2?
Principles of Chemistry II
Chapter 13: Chemical Equilibrium
Name: ____________________________________ Date: _____________
3.
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