Highest heat of combulsion CH4 , C2H4 C2H6 C2H2 Share with your friends Share 1 Karan Chotlani answered this c2h6 -1 View Full Answer Utkarsha Pande answered this it is C2H6 because heat of combustion increases with increase in molecular wt...molecular wt of ethane is highest -8 Ubaid answered this Answer is c2h4... -2 Dharshan M Nair answered this Will be C2H4 because the calorific value = given Kj per mol/molecular mass of glucose here it will be for c2h4 8 Harshada Kundlik Kandalkar answered this Give me all answers please 0