Chapter 19 Quiz

Chapter 19 Quiz - Chemistry 1B Chapter 19 Worksheet- Daley

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Unformatted text preview: Chemistry 1B Chapter 19 Worksheet- Daley Name___________________________________ 1) A reaction that is spontaneous as written __________. A) will proceed without outside intervention B) is very rapid C) is also spontaneous in the reverse direction D) has an equilibrium position that lies far to the left E) is very slow 2) When a system is at equilibrium, __________. A) the forward and the reverse processes are both spontaneous B) the reverse process is spontaneous but the forward process is not C) both forward and reverse processes have stopped D) the process is not spontaneous in either direction E) the forward process is spontaneous but the reverse process is not 3) The thermodynamic quantity that expresses the degree of disorder in a system is __________. A) enthalpy B) bond energy C) internal energy D) heat Fow E) entropy 4) The entropy of the universe is __________. A) continually increasing B) zero C) the same as the energy, E D) constant E) continually decreasing 5) The second law of thermodynamics states that __________. A) S = q rev /T at constant temperature B) E = q + w C) for any spontaneous process, the entropy of the universe increases D) the entropy of a pure crystalline substance is zero at absolute zero E) H rxn = n H f (products)- m H f (reactants) 6) Which one of the following is always positive when a spontaneous process occurs? A) S system B) H universe C) S surroundings D) H surroundings E) S universe 1 Chemistry 1B Chapter 19 Worksheet- Daley 7) Given the thermodynamic data in the table below, calculate the equilibrium constant for the reaction: 2 SO 2 (g) + O 2 (g) 2 SO 3 (g) Substance H f (kJ/mol) S(J/mol K) SO 2 (g)- 297 249 O 2 (g) 205 SO 3 (g)- 395 256 A) 1.06 B) 1.95 C) 2.32 10 24 D) 3.82 10 23 E) More data are needed. 8) The equilibrium constant for the following reaction is 5.0 10 8 at 25 C. N 2 (g) + 3H 2 (g) 2NH 3 (g) The value of G for this reaction is __________ kJ/mol....
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This note was uploaded on 02/23/2012 for the course CHEM AP taught by Professor Hx during the Fall '11 term at Manitoba.

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Chapter 19 Quiz - Chemistry 1B Chapter 19 Worksheet- Daley

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