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

Solution: Consider this system at equilibrium.A(aq) ⇌ B(aq)        ΔH = -750 kJ/molWhat can be said about Q and K immediately after an increase in temperature?A) Q > K because Q increasedB) Q > K because

Solution: Consider this system at equilibrium.A(aq) ⇌ B(aq)        ΔH = -750 kJ/molWhat can be said about Q and K immediately after an increase in temperature?A) Q > K because Q increasedB) Q > K because

Problem

Consider this system at equilibrium.

A(aq) ⇌ B(aq)        ΔH = -750 kJ/mol

What can be said about Q and K immediately after an increase in temperature?

A) Q > K because Q increased

B) Q > K because K decreased

C) Q < K because Q decreased

D) Q < K because K increased

E) Q = K because neither changed

 

How will the system respond to a temperature increase?

A) shift left

B) shift right

C) no change

Solution

We are being asked what would happen to the equilibrium constant (K) and the reaction quotient (Q) of the reaction at equilibrium when the temperature is increased.

To determine what would be the effect of the temperature in the equilibrium reaction, let’s first identify if the reaction is endothermic or exothermic.

Endothermic reaction: 

ΔH > 0
the system or the reaction is absorbing heat or taking heat from the surrounding

Exothermic reaction:

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