1.

For which one of the following equations is DeltaH_("react")^(@) equal to DeltaH_(f)^(@) for the product

Answer»

`2CO(g)+O_(2)(g)rarr2CO_(2)(g)`
`N_(2)(g)+O_(3)(g)rarrN_(2)O_(3)(g)`
`CH_(4)(g)+2Cl_(2)(g)rarrCH_(2)Cl_(2)(l)+2HCl(g)`
`Xe(g)+2F_(2)(g)rarrXeF_(4)(g)`

Solution :Both Xe and `F_(2)` are gaseous elements at `25^(@)C` and in their standard states and form `XeF_(4(g))` HENCE`DeltaH_((f))^(@)=DeltaH_("react")^(@)`


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