1. The entropy will usually increase when I. a molecule is broken into two or more smaller molecules. II. a reaction occurs that results in an increase in the number of moles of gas. III. a solid changes to a liquid. IV. a liquid changes to a gas. a. I only b. II only c. III only d. IV only e. I, II, III, and IV

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Chapter1: Chemical Foundations
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Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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1. The entropy will usually increase when
I. a molecule is broken into two or more smaller molecules.
II. a reaction occurs that results in an increase in the number of moles of gas.
III. a solid changes to a liquid.
IV. a liquid changes to a gas.
a. I only
b. II only
c. III only
d. IV only
e. I, II, III, and IV
2. For the reaction, A + B → C, ΔHo = +30 kJ; ΔSo = +50 J/K.
Therefore the reaction is:
a. spontaneous at all temperatures.
b. nonspontaneous at all temperatures.
c. spontaneous at temperatures less than 600 K.
d. spontaneous at temperatures greater than 600 K.
e. spontaneous only at 25oC.
3. The thermodynamic quantity that expresses the degree of disorder in a system is 
__________. 
a. enthalpy 
b. internal energy
c. bond energy
d. entropy
e. heat flow 
4. A reaction that is spontaneous as written __________. 
a. is very rapid 
b. will proceed without outside intervention 
c. is also spontaneous in the reverse direction 
d. has an equilibrium position that lies far to the left 
e. is very slow 
5. For an isothermal process, ΔS = __________. 
a. q
b. qrev/T 
c. qrev
d. Tqrev
e. q + w

 

Pleas answer all questions.

4. A reaction that is spontaneous as written
a. is very rapid
b. will proceed without outside intervention
c. is also spontaneous in the reverse direction
d. has an equilibrium position that lies far to the left
e. is very slow
5. For an isothermal process, AS =
a. q
b. qreulT
C. Qrev
d. Tqev
e. q +w
Transcribed Image Text:4. A reaction that is spontaneous as written a. is very rapid b. will proceed without outside intervention c. is also spontaneous in the reverse direction d. has an equilibrium position that lies far to the left e. is very slow 5. For an isothermal process, AS = a. q b. qreulT C. Qrev d. Tqev e. q +w
1. The entropy will usually increase when
I. a molecule is broken into two or more smaller molecules.
II. a reaction occurs that results in an increase in the number of moles of gas.
II. a solid changes to a liquid.
IV. a liquid changes to a gas.
a. I only
b. Il only
c. II only
d. IV only
e. I, II, III, and IV
2. For the reaction, A +B - C, AH° = +30 kJ; AS° = +50 J/K.
Therefore the reaction is:
a. spontaneous at all temperatures.
b. nonspontaneous atall temperatures.
C. spontaneous at temperatures less than 600 K.
d. spontaneous at temperatures greater than 600 K.
e. spontaneous only at 25°C.
3. The thermodynamic quantity that expresses the degree of disorder in a system is
a. enthalpy
b. internal energy
c. bond energy
d. entropy
e. heat flow
Transcribed Image Text:1. The entropy will usually increase when I. a molecule is broken into two or more smaller molecules. II. a reaction occurs that results in an increase in the number of moles of gas. II. a solid changes to a liquid. IV. a liquid changes to a gas. a. I only b. Il only c. II only d. IV only e. I, II, III, and IV 2. For the reaction, A +B - C, AH° = +30 kJ; AS° = +50 J/K. Therefore the reaction is: a. spontaneous at all temperatures. b. nonspontaneous atall temperatures. C. spontaneous at temperatures less than 600 K. d. spontaneous at temperatures greater than 600 K. e. spontaneous only at 25°C. 3. The thermodynamic quantity that expresses the degree of disorder in a system is a. enthalpy b. internal energy c. bond energy d. entropy e. heat flow
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