# Kinetics Quiz #1

8 Questions  I  By Mrjmoore
Quick quiz on reaction rates and enthalpys.

Changes are done, please start the quiz.

## Questions and Answers

 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 At room temperature which reaction would be expected to have the fastest reaction rate?
 A. 2KClO3(s)--> 2KCl(s) + 3O2(g)
 B. Pb+2(aq) + S-2(aq) --> PbS(s)
 C. 2H2(g) + O2(g) --> 2H2O(l)
 D. N2(g) + 2O2(g) --> 2NO2(g)
 8 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. Reaction will shift to the left
 B. Number of molecular collisions will increase
 C. Temperature will increase
 D. Forward reaction is endothermic
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