Chem 104 Exam 11 Actual Test Paper Questions Correct Answers Graded A Plus

CHEM 104 EXAM 11 ACTUAL TEST PAPER QUESTIONS CORRECT ANSWERS GRADED A
PLUS
CHEM 104 Exam11 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?