Question

Molar heat capacity at constant P for a substance is equal to:

• A. ${\left(\frac{\partial E}{\partial T}\right)}_V$
• B. ${\left(\frac{\partial H}{\partial T}\right)}_V$
• C. ${\left(\frac{\partial E}{\partial T}\right)}_P$
• D. ${\left(\frac{\partial H}{\partial T}\right)}_P$

Answer 1

The correct option is D ${\left(\frac{\partial H}{\partial T}\right)}_P$

Heat capacity is the amount of heat added to a substance to raise its temperature by one kelvin.

Hence, at constant pressure, the molar heat capacity is given by the ratio ${\left(\frac{\partial H}{\partial T}\right)}_P$