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# For the reaction : $C_7H_8(I)+9O_2(g) \longrightarrow 7CO_2(g) +4H_2O(I)$, the calculated heat of reaction is $232\; kJ/mol$ and observed heat of reaction is $50.4\; kJ/mol,$ then the resonance energy is

$(a)\;-182.2\;Kj/mol \\(b)\;+182.2 \;Kj/mol \\(c)\;172\; Kj/mol \\(d)\;None$

The resonance energy is $-182.2\;Kj/mol$
Hence a is the correct answer.