CHEM 104 EXAM11 Exam Questions and
Answers Verified Solutions Latest Update
2026/2027
Question:
• Which species are included in the equilibrium constant (K) expression?
Answer:
Only aqueous and gaseous species; pure solids and liquids are not included.
Question:
• How do you write a general Kc expression for a reaction aA+bB→cC+dD?
Answer:
Kc=[C]^c [D]^d / [A]^a [B]^b
Question:
• What is the difference between Kc and Kp?
Answer:
Kc uses concentrations (M); Kp uses partial pressures (atm).
Question:
• How can you tell if a reaction is product-favored or reactant-favored from K?
Answer:
K > 1: products favored ([products] > [reactants]) K < 1: reactants favored ([reactants] >
[products])
Question:
• What is Le Châtelier's Principle?
, Answer:
If a system at equilibrium is disturbed, it shifts to oppose the disturbance.
Question:
• How does changing concentration affect equilibrium?
Answer:
Add reactant: shifts toward products Remove reactant: shifts toward reactants K does not change
unless temperature changes
Question:
• How does changing pressure/volume affect equilibrium?
Answer:
Only gases matter. Increase P (decrease V): shifts to side with fewer gas moles Decrease P
(increase V): shifts to side with more gas moles
Question:
• How does temperature change affect equilibrium?
Answer:
Endothermic (∆H > 0): heat on reactant side T↑ → shifts right, K↑ T↓ → shifts left, K↓
Exothermic (∆H < 0): heat on product side T↑ → shifts left, K↓ T↓ → shifts right, K↑
Question:
• Do catalysts change equilibrium?
Answer:
No, they speed up the reaction but do not shift equilibrium.
Question:
• Does adding a pure solid or liquid affect equilibrium?
Answers Verified Solutions Latest Update
2026/2027
Question:
• Which species are included in the equilibrium constant (K) expression?
Answer:
Only aqueous and gaseous species; pure solids and liquids are not included.
Question:
• How do you write a general Kc expression for a reaction aA+bB→cC+dD?
Answer:
Kc=[C]^c [D]^d / [A]^a [B]^b
Question:
• What is the difference between Kc and Kp?
Answer:
Kc uses concentrations (M); Kp uses partial pressures (atm).
Question:
• How can you tell if a reaction is product-favored or reactant-favored from K?
Answer:
K > 1: products favored ([products] > [reactants]) K < 1: reactants favored ([reactants] >
[products])
Question:
• What is Le Châtelier's Principle?
, Answer:
If a system at equilibrium is disturbed, it shifts to oppose the disturbance.
Question:
• How does changing concentration affect equilibrium?
Answer:
Add reactant: shifts toward products Remove reactant: shifts toward reactants K does not change
unless temperature changes
Question:
• How does changing pressure/volume affect equilibrium?
Answer:
Only gases matter. Increase P (decrease V): shifts to side with fewer gas moles Decrease P
(increase V): shifts to side with more gas moles
Question:
• How does temperature change affect equilibrium?
Answer:
Endothermic (∆H > 0): heat on reactant side T↑ → shifts right, K↑ T↓ → shifts left, K↓
Exothermic (∆H < 0): heat on product side T↑ → shifts left, K↓ T↓ → shifts right, K↑
Question:
• Do catalysts change equilibrium?
Answer:
No, they speed up the reaction but do not shift equilibrium.
Question:
• Does adding a pure solid or liquid affect equilibrium?
