A. the entropy of the universe is continually increasing
B. energy is conserved in a chemical reaction.
C. spontaneous reactions are always exothermic.
D. the enthalpy of reaction is the difference between product and reactant enthalpies.
Answer: A
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A. the sublimation of carbon dioxide
B. the dissolution of NaCl in water
C. the evaporation of ethanol
D. the freezing of liquid water into ice
Answer: D
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A. the direction in which a reaction is spontaneous
B. the extent to which a reaction occurs.
C. the rate of reaction.
D. the temperature at which a reaction is spontaneous.
Answer: C
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A. the reaction is exothermic.
B. heat goes from the system into the surroundings
C. the disorder of the system increases
D. the Gibbs free energy is negative.
Answer: C
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A. The reaction is product favoured.
B. The reaction is not spontaneous.
C. The forward rate of reaction is fast.
D. The backward rate of reaction is slow.
Answer: A
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A. kinetic energy is increasing in the system
B. Potential energy is decreasing in the system
C. products have less potential energy than reactants
D. reactants have less potential energy than products.
Answer: D
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A. the boiling of liquid nitrogen
B. the freezing of water
C. the sublimation of dry ice
D. the vaporization of water
Answer: B
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A. From a gas to a solid
B. From a liquid to a solid
C. From a liquid to a gas
D. Change in the amoung of kinetic energy
Answer: C
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