14. The average specific heat capacity of benzene in the temperature range from 0 to 80 C 1.745 J / (g * K). The molar heat capacity of acetylene in the same temperature range is 43.93 J/(mol*K). The thermal effect of the reaction 3C2H2(g)=C6H6(l) under standard conditions is -630.8 kJ. Calculate the thermal effect of this reaction at 75 C.

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