Question

The molecule that has the change in heat capacity at higher temperatures among the following is

• A. $C{H}_4$
• B. $C{O}_2$
• C. $H_{2}O$
• D. All of the above

Answer 1

The correct option is D All of the above

Normally at room temperature, vibrational energy will not contribute to the heat capacity. But at higher temperature vibrational energy contribute to the total heat capacity. and hence heat capacities changes at higher temperature.
$C{H}_4,C{O}_2,H_{2}O$ all the three molecules have vibrational contribution to the total energy at higher temperature.