1.

In which of the following equations Delta H^(0) reaction equal to Delta H_(f)^(0) for the product?

Answer»

`2CO _((g)) + O_(2(g)) to 2 CO _(2(g))`
`N _(2 (g)) + O _(3(g)) to N _(2 ) O _(3 (g))`
`CH _(4 (g)) + 2 Cl _(2 (g)) to CH _(2) Cl _(2 (L)) + 2 HCl _((g))`
`XE _((g)) + 2 F _(2 (g)) to Xe F _(4 (g))`

Answer :D


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