17review - 17review Student: _ 1. When a chemical system is...

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Page 1 17review Student: ___________________________________________________________________________ 1. When a chemical system is at equilibrium, A. the concentrations of the reactants are equal to the concentrations of the products. B. the concentrations of the reactants and products have reached constant values. C. the forward and reverse reactions have stopped. D. the reaction quotient, Q , has reached a maximum. E. the reaction quotient, Q , has reached a minimum. 2. In order to write the correct mass-action expression for a reaction one must A. know the kinetic rate law for the reaction. B. know the mechanism for the reaction. C. have a properly balanced chemical equation. D. have values for the concentrations of the reactants. E. know the limiting reactant. 3. The reaction quotient for a gas phase reaction has a value of 2000. If the number of moles of reactants in the reaction equation is equal to that of the products, which of the following statements is true? A. The reaction must proceed to the left to establish equilibrium. B. The reaction must proceed to the right to establish equilibrium. C. When the system is at equilibrium, the concentrations of the products will be much larger than the concentrations of the reactants. D. The concentrations of the products are generally larger than the concentrations of the reactants. E. None of these statements is true.
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4. Write the mass-action expression, Q c , for the following chemical reaction equation. 2C 6 H 6 ( g ) + 15O 2 ( g ) 12CO 2 ( g ) + 6H 2 O( g ) A. B.
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This homework help was uploaded on 04/20/2008 for the course CHEM 1300/ taught by Professor Ballester during the Fall '08 term at Nova Southeastern University.

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17review - 17review Student: _ 1. When a chemical system is...

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