Equilibria Question Preview (ID: 54970)


Questions About Le'Chatelier's Principle. TEACHERS: click here for quick copy question ID numbers.

The value of the equilibrium constant, K, does NOT depend on
a) the temperature of the system
b) the nature of the reactants
c) the concentration of the reactants
d) the nature of the products

In an equilibrium with K = 4.6 x 10^9 L/mol,
a) the concentration of reactants is much smaller than the concentration of products
b) the concentration of reactants is much larger than the concentration of products
c) the concentration of reactants is about the same as the concentration of products
d) You can't tell from the information given

If the concentration of product were to double, the equilibrium constant would
a) double its value
b) become half its current value
c) quadruple its value
d) not change

Consider the formation of ammonia gas from nitrogen and hydrogen, which is endothermic. Which change would shift the equilibrium to the right?
a) increasing the temperature
b) decreasing the temperature
c) adding some NH3
d) removing some N2

Consider the equilibrium in which 2 moles of HI gas are formed from 1 mole of H2 gas and 1 mole of solid iodine. Which change would shift the equilibrium to the left?
a) increasing the pressure
b) decreasing the pressure
c) adding solid iodine
d) removing solid iodine

At equilibrium,
a) the rate of the forward reaction is 0
b) the rate of the backward reaction is 0
c) the change in concentration of reactants is 0
d) the concentration of reactants is 0

When heat is added to an exothermic system at equilibrium,
a) the equilibrium does not change
b) the equilibrium shifts towards reactants
c) the equilibrium shifts towards products
d) the reaction goes to completion

Which of the following is an example of a system in equilibrium?
a) Water evaporating from an open water bottle
b) Water evaporating and condensing within a closed water bottle
c) The reaction of hydrogen gas and oxygen gas to form water in a rocket plume
d) None of these is a system in equilibrium

Which of the following is an example of a system in equilibrium?
a) The formation of carbonic acid in the ocean
b) The reaction of hydrochloric acid with minerals to test the mineral content
c) The condensation of water on the outside of a cold glass
d) None of these is a system in equilibrium

Which state of matter is written in the expression for an equilibrium constant?
a) solid
b) liquid
c) gas
d) none of these states is written in the equilibrium expression

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