Question

What will be the enthalpy change of conversion of graphite into diamond?
Given
$C_{^{ }graphite,}\,\Delta_{comb}H=-391.25\,kj$;
$C_{diamond,}\,\Delta_{comb}H=-393.12\,kj$

• A. zero
• B. $-391.25\, kj$
• C. $-393.12 \,kj$
• D. $-1.87\, kj$

Answer 1

Answer: (D)

$\Delta H = -393.12 - (-391.25) = -1.87 \,kj$