The Standard Free-Energy Changes for the Reactions Below Are Given $\rightarrow$

question 53

Multiple Choice

The standard free-energy changes for the reactions below are given.
Phosphocreatine $\rightarrow$ creatine + P_i $\Delta$ G'° = -43.0 kJ/mol
ATP $\rightarrow$ ADP + P_i $\Delta$ G'° = -30.5 kJ/mol
What is the overall $\Delta$ G'° for the following reaction?
Phosphocreatine + ADP $\rightarrow$ creatine + ATP

• A)-73.5 kJ/mol
• B)-12.5 kJ/mol
• C)+12.5 kJ/mol
• D)+73.5 kJ/mol
• E)(\(\Delta\)G'° cannot be calculated without K_eq'.)

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