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If the standard molar enthalpy of format...

If the standard molar enthalpy of formation of `CaO_((s)), CO_(2(s)) and CaCO_(3(s))` is `-635, -393 and -1207kJ "mol"^(-1)` respectively, the `Delta_r H^(o.)` in `kJ mol^(-1)` for the reaction `CaCO_(3(s)) rarr CaO_((s)) + CO_(2(g))` is

A

`-179`

B

`265`

C

`223.5`

D

`+179`

Text Solution

Verified by Experts

The correct Answer is:
D
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