If C (diamond) rightarrow C (graphite) + X k | vedclass

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(B) Given reactions are:$(1) \ C 	ext{ (diamond)} ightarrow C 	ext{ (graphite)} + X \ kJ \ mol^{-1}$$(2) \ C 	ext{ (diamond)} + O_{2(g)} ightar

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$X = Y - Z$

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(B) Given reactions are:$(1) \ C 	ext{ (diamond)} ightarrow C 	ext{ (graphite)} + X \ kJ \ mol^{-1}$$(2) \ C 	ext{ (diamond)} + O_{2(g)} ightarrow CO_{2(g)} + Y \ kJ \ mol^{-1}$$(3) \ C 	ext{ (graphite)} + O_{2(g)} ightarrow CO_{2(g)} + Z \ kJ \ mol^{-1}$Applying Hess's Law,we can express reaction $(1)$ as $(2) - (3)$:$(C 	ext{ (diamond)} + O_{2(g)}) - (C 	ext{ (graphite)} + O_{2(g)}) = (CO_{2(g)} + Y) - (CO_{2(g)} + Z)$$C 	ext{ (diamond)} - C 	ext{ (graphite)} = Y - Z$$C 	ext{ (diamond)} ightarrow C 	ext{ (graphite)} + (Y - Z) \ kJ \ mol^{-1}$Comparing this with reaction $(1)$,we get $X = Y - Z$.

If $C$ (diamond) $\rightarrow C$ (graphite) $+ X \ kJ \ mol^{-1}$,$C$ (diamond) $+ O_{2(g)} \rightarrow CO_{2(g)} + Y \ kJ \ mol^{-1}$,and $C$ (graphite) $+ O_{2(g)} \rightarrow CO_{2(g)} + Z \ kJ \ mol^{-1}$,at constant temperature,then which of the following relations is correct?

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