Question

Calculate the standard enthalpy or comustion of `CH_(3)COOH_((l))` from the following data :
`Delta_(f)H^(@)(CO_(2))=-39383 KJ "mol"^(-1)`
`Delta_(f)H^(@)(H_2O)=-285*8 KJ "mol"^(-1)`
`Delta_(f)H^(@) (CH_(3)COOH)=-483*KJ"mol"^(-1)`

Answer 1

`CH_(3)COOH+2O_(2) to 2CO_(2)+2H_(2)O Delta H_(2)= ?`
`2(Delta H_(f)CO_(2))+2(Delta _(f)H_(2)O)-Delta _(f)HCH_(3)COOH=Delta H_(e)`
`=2xx393.KJ//"mol"+2xx-285*8 KJ//"mol"-(-483*2KJ//"mol")`
`=-786*6-577*6+48*3`
`=-875*0 kJ//"mol"`