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Unformatted text preview: markowitz (am45362) H04: Equilibrium 1 mccord (51625) 1 This print-out should have 16 questions. Multiple-choice questions may continue on the next column or page find all choices before answering. 001 10.0 points An equilibrium in which processes occur con- tinuously, with NO NET change, is called 1. heterogeneous equilibrium. 2. homogeneous equilibrium. 3. static equilibrium. 4. dynamic equilibrium. 002 10.0 points Explain why equilibium constants are dimen- sionless. 1. They are dimensionless because concen- trations and pressures have no units. 2. The statement is not true. Equilibrium constants have units that involve some multi- ple of atmospheres or moles per liter. 3. They are not really dimensionless but we must treat them as such in order to be able to take ln K in the expression G =- RT ln K . 4. They are dimensionless because the pres- sures or concentrations we put in are all for the substances in their standard states. 5. Every concentration or pressure that en- ters into K c or K p is really divided by the cor- responding concentration or pressure of the substance in its standard state. 003 10.0 points The expression for K c for the reaction at equi- librium is 4 NH 3 (g) + 5 O 2 (g) 4 NO(g) + 6 H 2 O(g) 1. [NO] 4 [H 2 O ] 6 2....
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This note was uploaded on 09/19/2011 for the course CH 302 taught by Professor Holcombe during the Spring '07 term at University of Texas at Austin.
- Spring '07