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How much heat ( in kcal ) will be required at constant pressure to form 1.28 kg of CaC_(2) from CaO(s) & C(s) ? Given: Delta_(f)H^(@)(CaO,s)=-152 kcal/mol. DeltaH_(f)(CaC_(2),s)=-14 kcal/mol DeltaH_(f)(CO,g)=-26 kcal/mol |
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Answer» Solution :[2240] `CaO(s)+3C(s) to CaC_(2)(s)+CO_(g)` `Delta_(f)H^(@)=(-14-26)-(-152)=+112 KCAL//mol` TOTAL heat required `=((1280)/(64))xx112implies 2240 kcal` |
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