Multiple Choice
The standard free energy change (ΔG°) measures which of the following?
3. Energy
Gibbs Free Energy and Equilibrium
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Which of the following ΔG values represents a reaction that is most likely to occur?
A
30
B
250
C
-30
D
-250
Verified step by step guidance1
Understand that ΔG, or Gibbs free energy change, indicates the spontaneity of a reaction. A negative ΔG value suggests that a reaction is spontaneous and can occur without external energy input.
Recognize that a positive ΔG value means the reaction is non-spontaneous and requires energy input to proceed.
Compare the given ΔG values: 30, 250, and -30. Note that the negative value, -30, indicates a spontaneous reaction.
Consider the magnitude of the ΔG value. A more negative value generally means the reaction is more favorable and likely to occur.
Conclude that among the given options, the ΔG value of -30 represents a reaction that is most likely to occur spontaneously.
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