Question

The temperature at which the root mean square velocity of a molecule will be doubled than at ${100}^{\circ }C$

• A. ${1219}^{\circ }C$
• B. ${1492}^{\circ }C$
• C. ${400}^{\circ }C$
• D. 400 K

Answer 1

The correct option is A

${1219}^{\circ }C$

$v=\sqrt{\frac{3RT}{M}}.Hencev\propto \sqrt{T}2=\sqrt{\frac{T}{273+100}}\Rightarrow T=1492K={1219}^{\circ }C$