Question

Enthalpy of combustion of `CH_(4)` , `C_(2)H_(6)` and `C_(3)H_(8)` are `-210-370` and `-530Kcal//mol` respectivaly. The approximate value of enthalpy of combustion of `n`-hexane is
A. `-1170 (Kcal)/(mol)`
B. `-750(Kcal)/(mol)`
C. `-1010(Kcal)/(mol)`
D. `-590(Kcal)/(mol)`

Answer 1

Correct Answer - A
For each `-CH_(2)` the enthaply of combustion is increased by `160Kcal//mol` .
`:. Delta_(comb)H(C_(6)H_(6))-210-5xx160=-1010(Kcal)/(mol)`