Heat of neuralisation is amount of heat evolved or absorbed when `1g-` equivalent of
Channel: Doubtnut
Date: 2020-08-02

Heat of neuralisation is amount of heat evolved or absorbed when `1g-` equivalent of an acid reacts with `1g-` equivalent of a base in dilute solution . If weak acid or weak bae are neutralised, the heat released during neutralisation is somewhat lesser than `-13.7kcal` or `-57.27 kJ` . Het of neutralisation is also referred as heat of formation of water from `H^(+)` and `OH^(-)` ions `i.e., H^(+)+OH^(-) rarr H_(2)O, DeltaH=-13.7kcal. `  Which of the following statements are correct ?  `(1)` `DeltaH=DeltaU+DeltanRT`  `(2)` Heat changes measured by bomb calorimeter give change in heat enthalpy during the reaction.   `(3)` `DeltaH=DeltaU` for the reaction `:`  `C_((s))+O_(2(g))rarr CO_(2(g))`  `(4)` Heat of formation for `C_(6)H_(6)` can be directly measured.