Question

Variation of $\Delta Hvs$ temperature is given by:

• A. Kirchhoff's equation
• B. Gibbs-Helmholtz equation
• C. Clausius-Clapeyron equation
• D. Van't Hoff's equation

Answer 1

The correct option is A Kirchhoff's equation

The variation of H vs temperature is given by Kirchhoff's equation.
It is $\Delta H_2-\Delta H_1=\Delta C_p(T_2-T_1)$
Here, $\Delta H_1$ and $\Delta H_2$ represents the enthalpy change for the reaction at two different temperatures $T_1$ and $T_2$ respectively, .
$\Delta C_p$ represents the change in the heat capacity at constant pressure.