Sample Midterm Solutions 1

Sample Midterm Solutions 1 - 1 Chemistry 102 Sample Midterm...

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1 Chemistry 102 Sample Midterm #1 Solutions Section E2, Brown 1. (5 marks) Circle the correct answer. a) (1 mark) If reactant molecules collide with energy greater than the activation energy, they always change into product molecules. True False b) (1 mark) The activation energy of a reaction depends on the temperature of the reaction. True False c) (1 marks) If the half-life of a reaction depends on the concentration of the reactant, then the reaction cannot be order. Zero First Second Third d) (1 mark) For a second order reaction, the correct units for the rate constant, k, are i) s -1 ii) M -1 s -1 iii) M -2 s -1 iv) M -3 s -1 v) None of the above e) (1 mark) Consider the reaction 3 Fe (s) + 4 H 2 O (g) ! Fe 3 O 4 (s) + 4 H 2 (g) " H = - 150 kJ If a catalyst is added, the amount of H 2 produced will remain the same. True False
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2 2. a) (2 marks) If two reactions have identical activation energies, does this mean the rate constant will also be identical if the reactions are run at the same temperature? Explain your answer. ANSWER:
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Sample Midterm Solutions 1 - 1 Chemistry 102 Sample Midterm...

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