Given that heats of combustion of ethylene, hydrogen and ethane are –337.0, –68.4 and –373.0 kcal respectively at 25ºC, the heat of reaction
C2H4(g) + H2(g) → C2H6(g) at 25ºC will be
1
–32.4 kcal
2
–36.3 kcal
3
–37.8 kcal
4
None of these
Given that heats of combustion of ethylene, hydrogen and ethane are –337.0, –68.4 and –373.0 kcal respectively at 25ºC, the heat of reaction
C2H4(g) + H2(g) → C2H6(g) at 25ºC will be