Chemical Equilibrium

4 Written Questions

1. the expressions that describes the relationship among the concentrations (or partial pressures) of the substances present in a system at equilibrium. Numerator=products raised to coefficients, and denominator=reactants raised to coefficients. *It depends only on the stoichiometry of the reaction, not on its mechanism
2. (chemistry) the ratio of concentrations when equilibrium is reached in a reversible reaction (when the rate of the forward reaction equals the rate of the reverse reaction)
3. (Q) the value that is obtained when concentrations of reactants and products are inserted into the equilibrium expression. If the concentrations are equilibrium concentrations, Q=K, otherwise Q can't equal K.
4. a process to synthesize ammonia on an industrial scale. developed by German chemist Fritz Haber and Carl Bosch, the process has enabled humans to double the natual rate of nitrogen fixation on Earth and thereby increase agricultural productivity, but it has also dramatically altered the nitrogen cycle

3 Multiple Choice Questions

1. a state of balance in which the rates of the forward and reverse reactions are equal; no net change in the amount of reactants and products occurs in the chemical system
   1. homogeneous equilibria
   2. heterogeneous equilibria
   3. chemical equilibrium
   4. reaction quotient
2. (chemistry) the law that states the following principle: the rate of a chemical reaction is directly proportional to the molecular concentrations of the reacting substances
   1. Haber process
   2. catalyst
   3. reaction quotient
   4. law of mass action
3. (chemistry) a substance that initiates or accelerates a chemical reaction without itself being affected
   1. catalyst
   2. reaction quotient
   3. Haber process
   4. law of mass action

3 True/False Questions

1. homogeneous equilibria → an equilibrium system in which all reactants and products are in the same state

   True        False

2. heterogeneous equilibria → an equilibrium system in which all reactants and products are in the same state

   True        False

3. le chatelier's principle → if a system at equilibrium is subjected to a small change the equilibrium tends to shift so as to minimize the effect of the change

   True        False