Enthalpy change of CH_(4)+(1)/(2) O_(2) rarr CH_(3) OH is negative . If enthalpy of combustion ofCH_(4) andCH_(3)OH are x and y respectively, then which relation is correct ?

Enthalpy change of CH_(4)+(1)/(2) O_(2) rarr CH_(3) OH is negative . I

1.	Enthalpy change of CH_(4)+(1)/(2) O_(2) rarr CH_(3) OH is negative . If enthalpy of combustion ofCH_(4) andCH_(3)OH are x and y respectively, then which relation is correct ?
Answer» `x gt y` `x lty` `x=y` `x GEY` Solution :(i) `CH_(4) + 2O_(2)rarr CO_(2)+ 2H_(2)O , DeltaH= x` (ii) `CH_(3) OH + (3)/(2) O_(2) rarr CO_(2)+ 2H_(2)O, DeltaH =y` (i) - (ii) GIVES `DeltaH ` for the given reaction, i.e., `DeltaH = x-y `.As it is -ve , `x lty`