For a reaction, `CaCO_(3(s)) rarr CaO_((s))+CO_(2(g))` `Delta_(f)H^(@)(CaO)=-"631.1 kJ mol"^(-1)` `Delta_(f)H^(@)(CO_(2))=-"393.5 kJ mol"^(-1) and` `Delta_(f)H^(@)(CaCO_(3))=-"1206.9 kJ mol"^(-1)` Which of the following is a correct statement?A. A large amount of heat is evolved during the decomposition of `CaCO_(3)`.B. Decomposition of `CaCO_(3)` is an endothermic process and heat is provided for decompositionC. The amount of heat evolved cannot be calculated from the data provided .D. `Delta_(f)H^(@)=SigmaDelta_(f)H^(@)" (reactants)"-Sigma Delta_(f)H^(@)" (products)"`

For a reaction, `CaCO_(3(s)) rarr CaO_((s))+CO_(2(g))` `Delta_(f)H^(@)

1.	For a reaction, `CaCO_(3(s)) rarr CaO_((s))+CO_(2(g))` `Delta_(f)H^(@)(CaO)=-"631.1 kJ mol"^(-1)` `Delta_(f)H^(@)(CO_(2))=-"393.5 kJ mol"^(-1) and` `Delta_(f)H^(@)(CaCO_(3))=-"1206.9 kJ mol"^(-1)` Which of the following is a correct statement?A. A large amount of heat is evolved during the decomposition of `CaCO_(3)`.B. Decomposition of `CaCO_(3)` is an endothermic process and heat is provided for decompositionC. The amount of heat evolved cannot be calculated from the data provided .D. `Delta_(f)H^(@)=SigmaDelta_(f)H^(@)" (reactants)"-Sigma Delta_(f)H^(@)" (products)"`
Answer» Correct Answer - B `Delta_(r)H=Sigma_(f)H_(p)^(@)-SigmaDelta_(f)H_(R)^(@)` `=[-635.1+(-393.5)]-[-1206.9]=+178.4kJ`

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