CHEM 162 Exam 2 with complete verified solutions 2025
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Course
Chem 162
Institution
Chem 162
Vapor Pressure is a form of Dynamic Equilibrium
Molecules are constantly moving between phases, but the rate at which the molecules move from the liquid ↔ gas phase is constant
Chemical Equilibrium
a state in which the rate of a forward reaction and the rate of the reverse reaction are t...
CHEM 162 Exam 2 with
complete verified solutions
2025
Vapor Pressure is a form of Dynamic Equilibrium - answer
Molecules are constantly moving between phases, but the rate at
which the molecules move from the liquid ↔ gas phase is constant
Chemical Equilibrium - answer a state in which the rate of a
forward reaction and the rate of the reverse reaction are the same
as the reaction uses its reactants the forward reaction starts to slow
down
How is chemical equilibrium reached? - answer reactants and
products are still forming when it is reached, just at the same rate
the equilibrium constant - answer describes the ratio of how much
products compared to reactants there are at equilibrium
relative reaction rate - answer k<1 the reverse reaction is favored
the reaction lies to the left ; at equilibrium there are more products
than reactants
k>1 - answer the forward reaction is favored; the reaction lies to
the right; at equilibrium there are more products than reactants
k=1 - answer neither reaction is favored
, Pressure - answer proportional to concentration for gases in a
closed system
manipulating the reaction - answer the equilibrium constant of a
reaction in the reverse reaction is the reciprocal of the equilibrium
constant of the forward reaction
the equilibrium constant of a reaction with its stoichiometry
doubled is squared
a reaction with its stoichiometry multiplied or divided is
represented as an exponential change for the equilibrium constant
Reaction Quotient, Q - answer is a numerical ration of products to
reactants , if Q < K, then the reaction is not at equilibrium, the
reaction needs to proceed in the forward direction to produce more
products in order to reach equilibrium
If Q > K, then the reaction is not at equilibrium; the reaction needs
to proceed in the reverse direction to produce less products in order
to reach equilibrium
If Q = K, then the reaction is at equilibrium
4 Ways to Affect Equilibrium: - answer 1) changing concentration of
Reactants/products
2)Changing temperature of Reaction
3)Changing Volume/Pressure of Reaction
4)Adding A Catalyst/Adding a Noble gas
Le Chatelier's Principle - answer If a system is at equilibrium and a
change is made to the system, then the reaction will counteract the
change to re-establish equilibrium
Changing Concentration of Reactants/Products - answer If you add
reactants, RXN will shift to the right.
If you add products, RXN will shift to the left.
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