1A. 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. Il only c. II only d. IV only e. I, II, III, and IV 1B. For the reaction, A +B - C, AH° = +30 kJ; AS° = +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 25°C. 1C. 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
1A. 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. Il only c. II only d. IV only e. I, II, III, and IV 1B. For the reaction, A +B - C, AH° = +30 kJ; AS° = +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 25°C. 1C. 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
Chemistry
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ISBN:9781305957404
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Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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Lock And Key Model
The lock-and-key model is used to describe the catalytic enzyme activity, based on the interaction between enzyme and substrate. This model considers the lock as an enzyme and the key as a substrate to explain this model. The concept of how a unique distinct key only can have the access to open a particular lock resembles how the specific substrate can only fit into the particular active site of the enzyme. This is significant in understanding the intermolecular interaction between proteins and plays a vital role in drug interaction.
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Please provide a brief explanation.
Transcribed Image Text:1A. 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. Il only
c. Il only
d. IV only
e. I, II, III, and IV
1B. For the reaction, A + B C, AH° = +30 kJ; AS° = +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 25°C.
1C. 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
1D. 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
1E. For an isothermal process, AS =
a. q
b. qrev/T
C. qrev
d. Tqrev
e. q + w
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