The enthalpies of combustion of graphite and diamond are 393.5 kJ and 395.4 kJ respectively. Calculate the enthalp change accompanying the transformation of 1 mole of graphite into diamond.

The enthalpies of combustion of graphite and diamond are 393.5 kJ and

1.	The enthalpies of combustion of graphite and diamond are 393.5 kJ and 395.4 kJ respectively. Calculate the enthalp change accompanying the transformation of 1 mole of graphite into diamond.
Answer» Correct Answer - `1.9 kJ mol^(-1)` Given `: (i) C(gr) + O_(2)(g) rarr CO(_(2)(g), DeltaH = - 393. 5 kJ mol^(-1)` (ii) `C(dia) + O_(2)(g) rarr CO_(2)(g) , Delta H = -395kJ mol^(-1)` Aim `: C (gr) rarr C (dia) , Delta H = ?` Eqn. (i) - Eqn. (ii) gives the required result.

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The enthalpies of combustion of graphite and diamond are 393.5 kJ and 395.4 kJ respectively. Calculate the enthalp change accompanying the transformation of 1 mole of graphite into diamond.

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