question_answer

If enthalpies of formation for \[{{C}_{2}}{{H}_{4(g)}},C{{O}_{2(g)}}\]and \[{{H}_{2}}O(l)\] at \[25{}^\circ C\] and 1 atm pressure are 52, -394 and -286 kJ/mol respectively, then enthalpy of combustion of \[{{C}_{2}}{{H}_{4}}(g)\]will be:

A)  -141.2 kJ/mol   

B)         +14.2 kJ/mol    

C)     +141.2 kJ/mol   

D)         -1412 kJ/mol