Heat of neuralisation is amount of heat evolved or absorbed when `1g-` equivalent of an
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. `  `200mL` of `0.1M NaOH` is mixed with `100mL` of `0.1M H_(2)SO_(4)` in 1 experiment. In `II` experiment `100mL` of `0.1M NaOH` is mixed with `50mL` of `0.1M H_(2)SO_(4)`. Select the correct statements:  `(1)` heat liberated in each of the two  reactions is `274cal`.   `(2)` heat liberated in `I` is `274 cal` and in `II` is `137 cal`.  ,brgt `(3)` temperature rise is `I` reaction is equal to the temperature rise in `II`.  `(4)` temperature rise in `I` reaction is equal to the temperaure rise in `II`