Question

The specific heat of metal is $0.16$. Its approximate atomic weight would be

• A. 16
• B. 32
• C. 40
• D. 64

Answer 1

The correct option is C

40

Explanation of the correct answer:

The correct answer is option C:

Dulong's Petit legislation specifies,

Atomic mass times specific heat equals $6.4$.

The atomic weight is thus equal to 6.4/specific heat.

$\begin{array}{rcl}\mathrm{Atomic}\mathrm{mass}& =& 6.4/0.16\\ & =& 40\end{array}$

As a result, metal has an approximately $40$ atomic weight.