Which of the following reactions will not define `Delta H_(f)^(@)`?
`C(gra p hite)+O_(2(g))rarr CO_(2(g))`
`(1)/(2)N_(2(g))+(3)/(2)H_(2(g))rarr NH_(3(g))`
`Na_((s))+(1)/(2)Cl_(2(g))rarr NaCl_((s))`
`CO_((g))+(1)/(2)O_(2(g))rarr CO_(2(g))`