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Calculate the heat of reaction at 298 K ...

Calculate the heat of reaction at 298 K for the reaction`C_2H_(4(g)) + H_2(g) rarr C_2H_(6(g))` given the heats of combustion of ethylene, hydrogen and ehane are 337.0,68.4 and 373.0 kcal respectviely.

A

23.4 kcal

B

62.2 kcal

C

32.4 kcal

D

34.2 kcal

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