Question

Using Debye’s theory, atomic heat capacity of a solid at constant volume, \( C_V \) at high temperature is given by:

• A. \( C_V = R \)
• B. \( C_V = 2R \)
• C. \( C_V = 3R \)
• D. \( C_V = \frac{3}{2} R \)

Hint:

At high temperatures, the heat capacity of a solid follows the Dulong-Petit law.

Answer 1

The Correct Option is C

According to the Dulong-Petit law, at high temperatures, the heat capacity of a solid approaches:
\[ C_V = 3R \]