The standard entropies of `CO_(2(g)), C_((s)), and O_(2(g))` are 213.5, 5.740 and 205 `JK^-1` respectively. The standard entropy of formation of `CO_2` is _________.

The standard enthalpies of formation of C_2H_5OH_((l)), CO_(2(g)) and H_2O_((l)) are -277 , -393.5 and -285.5 "kJ mol"^(-1) respectively . Calculate the standard enthalpy change for the reaction C_2H_5OH_((l)) +3O_(2(g)) to 2CO_(2(g)) +3H_2O_((l)) The enthalpy of formation of O_(2(g)) in the standard state is zero , by definition.

Delta_(f)^(@) for CO_(2(g)), CO_((g)) and H_(2)O_((g)) are -393.5,-110.5 and -241.8kJ mol^(-1) respectively. The standard enthalpy change ( in kJ) for given reaction is : CO_(2(g))+H_(2(g)) rarr CO_((g))+H_(2)O_((g))