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Multiple Choice
If, during a process, the system becomes more ordered, then __________.
A
ΔG is negative
B
ΔG is positive
C
ΔH is negative
D
ΔH is positive
E
ΔS is negative
Verified step by step guidance
1
Understand the relationship between Gibbs free energy (ΔG), enthalpy (ΔH), and entropy (ΔS) in the context of the equation: ΔG = ΔH - TΔS, where T is the temperature in Kelvin.
Recognize that entropy (ΔS) is a measure of disorder or randomness in a system. A negative ΔS indicates that the system becomes more ordered.
Consider the implications of a negative ΔS on the Gibbs free energy equation. If ΔS is negative, the term TΔS becomes negative, which can affect the sign of ΔG depending on the values of ΔH and T.
Evaluate the options given in the problem. Since the system becomes more ordered, ΔS is negative, which directly answers the question.
Conclude that the correct statement is that ΔS is negative when the system becomes more ordered, as this reflects a decrease in entropy.