Home
Class 11
CHEMISTRY
The enthalpy of certain reaction at 273 ...

The enthalpy of certain reaction at `273 K` is `-20.75 kJ`. The enthalpy of the same reaction at `373 K` provided heat capacities fo reactants and products are the same) will be

A

`- 2075 kJ`

B

zero

C

`20.75 xx (373)/(273) kJ`

D

`- 20.75 kJ`

Text Solution

Verified by Experts

The correct Answer is:
D
According to Kirchoff's equation,
`Delta_ H_(2) Delta H_(1) = Delta C_(P) (T_(2) - T_(1))`
Since `(C_(P))_("Products") = (C_(P))_("reactants")`, we have `Delta C_(P) = 0`, Thus,
`Delta H_(2) - Delta H_(1) = 0` ltbr gt or `Delta H_(2) = Delta H_(1)`
Promotional Banner

Topper's Solved these Questions

  • THERMODYNAMICS

    R SHARMA|Exercise Ouestion Bank Level IV|6 Videos

  • THERMODYNAMICS

    R SHARMA|Exercise Archives|59 Videos

  • THERMODYNAMICS

    R SHARMA|Exercise Ouestion Bank Level II|14 Videos

  • THE S BLOCK ELEMENTS

    R SHARMA|Exercise ARCHIVES|27 Videos

Similar Questions

Explore conceptually related problems

The enthalpy of a reaction at 273 K. is -3.57 KJ. What will be the enthalpy of reaction at 373 K if DeltaC_(p) = zero :-

The enthalpy of evaporation of water at 373 K is 40.67 kJ mol^(-1) . What will be the enthalpy of evaporation at 353 K and 393 K if average molar heats at constant pressure in this range for water in liquid and vapour states are 75.312 and 33.89 JK^(-1) mol^(-1) respectively?

In an exothermic reaction, the total enthalpy of reactant is ………….then that of products.