JEE Main Chemistry question

Chemistry Thermodynamics JEE Main

of graphite is and of diamond is . from graphite to diamond is

(A)1.66 kJ/moleCorrect
(B)2.1 kJ/mole
(C)2.33 kJ/mole
(D)1.5 kJ/mole

Answer: (A)

Solution

\Delta H_{reaction} = \Delta H_f(diamond)-\Delta H_f(graphite) = 1.896-0.23 \approx 1.66\ kJ/mol.

Question ID VK-135177