"A Diamond Is Forever" Is One of the Most Successful

question 65

Multiple Choice

"A diamond is forever" is one of the most successful advertising slogans of all time. But is it true? For the reaction shown below, calculate the standard free energy change at 298K and determine whether or not a diamond is "forever". C(diamond)  C(graphite)
Data: H_f°(diamond) = 1.895 kJ/mol; S°(diamond) = 2.337 J mol^-1 K^-1;
S°(graphite) = 5.740 J mol^-1K^-1.

• A) .  G° = 2.19 kJ; forever
• B) .  G° = -1.90 kJ; not forever
• C) .  G° = -2.90 kJ; not forever
• D) .  G° = 1.90 kJ; forever
• E) .  G° = < -1000 kJ; not forever

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