1.

Which of the following expression is true :-

Answer»

`H_(F)^(@)(CO,G)=(1)/(2)Delta H_(f)^(@)(CO_(2),g)`
`Delta H_(f)^(@)(CO,g)=Delta H_(f)^(@)("C, graphite") +(1)/(2) Delta H_(f)^(@)(O_(2),g)`
`Delta H_(f)^(@)(CO,g)=Delta H_(f)^(@)(CO_(2),g)-(1)/(2) Delta H_(f)^(@)(O_(),g)`
`Delta H_(f)^(@)(CO,g)=Delta H_("comb")^(@)("C, graphite")-Delta H_("comb")^(@)(CO, g)`

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