A) CH3OH
B) CH3CH2OH
C) CH3CH2CH2OH
D) CH3CH2CH2CH2OH
E) CH3CH2CH2CH2CH2OH
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Correct Answer
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A) in a spontaneous process,there is a net increase in entropy,taking into account both the system and the surroundings.
B) there is no disorder in a perfect crystal at 0 K.
C) the total energy of the universe is always increasing.
D) the total energy of the universe is constant.
E) mass and energy are conserved in all chemical reactions.
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Correct Answer
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A) a reaction is spontaneous if ΔG < 0.
B) if ΔG = 0,the system is at equilibrium.
C) if ΔG = 0,then ΔS = ΔH.
D) if ΔG > 0,then a reaction is not spontaneous.
E) ΔG is referred to as Gibbs free energy.
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Correct Answer
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A) for a given material,the gas has greater entropy than the solid.
B) the entropy for gaseous elements is zero at 298 K.
C) at 0 K,an ordered pure crystalline solid has an entropy of zero.
D) for a given material,the liquid has greater entropy than the solid.
E) increasing the temperature of a substance increases its entropy.
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Correct Answer
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A) when products and reactants are in standard state concentrations.
B) when K = 0.
C) when K > 1.
D) for a system at equilibrium.
E) when the entropy change is zero.
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Correct Answer
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A) ΔH > 0 and ΔS > 0
B) ΔH > 0 and ΔS = 0
C) ΔH < 0 and ΔS > 0
D) ΔH < 0 and ΔS < 0
E) ΔH < 0 and ΔS = 0
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Correct Answer
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A) ΔH < 0.
B) ΔH > 0.
C) ΔH = 0.
D) ΔS = 0.
E) ΔS > 0.
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Correct Answer
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A) 0.0125 kJ/K
B) 0.0249 kJ/K
C) 0.0458 kJ/K
D) 0.142 kJ/K
E) 1.02 kJ/K
Correct Answer
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Correct Answer
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A) ΔH < 0 and ΔS < 0
B) ΔH < 0 and ΔS = 0
C) ΔH = 0 and ΔS > 0
D) ΔH > 0 and ΔS > 0
E) ΔH > 0 and ΔS < 0
Correct Answer
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Correct Answer
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