ThermochemistryMedium

Question

For the allotropic change represented by the equation C(graphite) → C(diamond); ΔH = +1.9 kJ. If 6.0 g of diamond and 6.0 g of graphite is burnt completely in separate experiments, then the heat liberated will be higher by

Options

A.1.9 kJ in case of graphite.
B.1.9 kJ in case of diamond.
C.0.95 kJ in case of diamond.
D.0.95 kJ in case of graphite.

Solution

Heat liberated is greater for diamond by $\frac{1.9}{12} \times 6 = 0.95\text{ kJ}$

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