Ch.14 - Chemical EquilibriumWorksheetSee all chapters
All Chapters
Ch.1 - Intro to General Chemistry
Ch.2 - Atoms & Elements
Ch.3 - Chemical Reactions
BONUS: Lab Techniques and Procedures
BONUS: Mathematical Operations and Functions
Ch.4 - Chemical Quantities & Aqueous Reactions
Ch.5 - Gases
Ch.6 - Thermochemistry
Ch.7 - Quantum Mechanics
Ch.8 - Periodic Properties of the Elements
Ch.9 - Bonding & Molecular Structure
Ch.10 - Molecular Shapes & Valence Bond Theory
Ch.11 - Liquids, Solids & Intermolecular Forces
Ch.12 - Solutions
Ch.13 - Chemical Kinetics
Ch.14 - Chemical Equilibrium
Ch.15 - Acid and Base Equilibrium
Ch.16 - Aqueous Equilibrium
Ch. 17 - Chemical Thermodynamics
Ch.18 - Electrochemistry
Ch.19 - Nuclear Chemistry
Ch.20 - Organic Chemistry
Ch.22 - Chemistry of the Nonmetals
Ch.23 - Transition Metals and Coordination Compounds
Problem

Consider the following system at equilibrium:

2 NH3(g) ⇌ N2(g) + 3 H2(g)     ΔHrxn = 92.94 kJ

Which of the following changes will shift the equilibrium to the right?

I. increasing the temperature

II. decreasing the temperature

III. increasing the volume

IV. decreasing the volume

V. removing some NH3

VI. adding some NH3

VII. removing some N2

VIII. adding some N2

A. II, IV, V, VIII 

B. I, III, V, VII 

C. I, III, VI, VII

D. II, III, VI, VII 

E. I, IV, VI, VIII

Solution

We are asked which of the following changes will shift the equilibrium to the right.

2 NH3(g) ⇌ N2(g) + 3 H2(g)     ΔHrxn = 92.94 kJ


Le Chatelier’s Principle Basics

Under Equilibrium Law, when a chemical reaction shifts in the forward direction to offset changes made to its equilibrium position the product side will increase and the reactant side will decrease. 

Dynamic-Equilibrium-Forward-Direction-Counteract-Disturbed-Adjust-Moderated


Equilibrium Shift (Forward Direction)

When a chemical reaction shifts in the reverse direction to offset changes made to its equilibrium position the product side will decrease and the reactant side will increase. 

Equilibrium-shift-reverse-changing-the-conditions

Equilibrium Shift (Reverse Direction)


Analyze each : 


I. increasing the temperature


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