What is the standard Gibbs free energy for the transformation of diamond to graphite at 298 K? Cdiamond?Cgraphite Express your answer to three significant figures and include the appropriate units

Chemistry Jan 05, 2021

What is the standard Gibbs free energy for the transformation of diamond to graphite at 298 K?

Cdiamond?Cgraphite

Express your answer to three significant figures and include the appropriate units.

Gibbs free energy is a measure of the spontaneity of a chemical reaction. It is the chemical potential for a reaction, which is minimized at equilibrium. It is defined as

G=H?TS

Elemental carbon usually exists in one of two forms: graphite or diamond. It is generally believed that diamonds last forever. Here are the standard enthalpy of formation (?H?f) and the standard molar entropy (S?) values for diamond and graphite.

Substance	?H?f (kJ/mol)	S? (J/mol?K)
Cgraphite	0	5.740
Cdiamond	1.897	2.38

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