Kinetics Quiz #1
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Quick quiz on reaction rates and enthalpys.
- 1.The difference between the potential energy of the products and the potential energy of the reactants is the
- A.
Heat of fusion
- B.
Heat of reaction
- C.
Free energy
- D.
Activation energy
- E.
Positive energy
- 2.When NH4NO3 is dissolved in water, the temperature of the water decreases. When NaOH is dissolved in a separate water sample, the temperature of the water increases. Based on these observations, it can be concluded that the dissolving of
- A.
Both salts are endothermic.
- B.
Both salts are exothermic.
- C.
NH4NO3 is exothermic and the dissolving of NaOH is endothermic.
- D.
NH4NO3 is endothermic and the dissolving of NaOH is exothermic.
- 3.What is the heat of formation of 1 mole of H2O(g)?
- A.
-241.8 kj/mol
- B.
-483.6 kj/mol
- C.
-285.5 kj/mol
- D.
-571.6 kj/mol
- 4.Activation energy is required to initiate
- A.
Endothermic reactions only.
- B.
Neither exothermic or endothermic reactions.
- C.
Both exothermic and endothermic reactions.
- D.
Exothermic reactions only.
- 5.In the reversible reaction, the difference between the activation energy of the forward reaction and the activation energy of the reverse reaction is equal to the
- A.
Activated complex.
- B.
Potential energy of the products.
- C.
Potential energy of the reactants.
- D.
Heat of reaction.
- 6.Which condition will increase the rate of a chemical reaction?
- A.
Increased temperature and decreased concentration of reactants
- B.
Increased temperature and increased concentration of reactants
- C.
Decreased temperature and decreased concentration of reactants
- D.
Decreased temperature and increased concentration of reactants.
- 7.Given the reaction: 2 SO2(g) + O2(g) --> 2 SO3(g) The rate of the forward reaction increases by adding more SO2 because the
- A.
Number of molecular collisions will increase
- B.
Temperature will increase
- C.
Forward reaction is endothermic
- D.
Reaction will shift to the left
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