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Heat of neuralisation is amount of heat ...

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. `
Heat of neutralisatio of `HF` and acetic acid respectively are `(` in `kcal):`

A

`gt-13.7,larr13.7`

B

`gt-13.7`, `lt-13.7`

C

`larr13.7`

D

`larr13.7,gt-13.7`

Text Solution

Verified by Experts

The correct Answer is:
b
`F^(-)` shows extensive hydration
`:. DeltaH_(n eutralisation)gt-13.7`
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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.

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

If Weak acid or weak base are neutralised ,the heat relealised , the heat released during neutralisatiojn is somewhat lesser than -13.7 kcal or -57.27Kj .Heat of neutralistion is also referred to as heat of formation of water from H^(+) and OH^(-) ionsi.e ., H^(+)OH^(-)to H_(2)O, Deltah=-13.7kcal Magnitude of heat of neutralistion of Hi and acetic acid respectively are (in kcal ) buy strong base are:

Heat of neutralisation is least when

For neutralisation of HF+NaOH rarr NaF+H_(2)O , heat released during neutralisation is:

The heat of neutralisation is maximum when

Statement : Heat of neutralisation can be given as : H^(+)+OH^(-) rarr H_(2)O, DeltaH=-13.6 kcal. Explanation : Heat of neutralisation can be alternatively defined as heat of formation of water.

Heat of neutralisation of a strong dibasic acid in dilute solution by NaOH is nearly :

The heat released when NH_(4)OH and HCl neutralise is