Question

The temperature of the gas is raised from 27${}^{\circ }$ C to 927${}^{\circ }$ C, the root mean square velocity is

• A. times the earlier value
• B. Same as before
• C. Halved
• D. Doubled

Answer 1

The correct option is D

Doubled

$U_2=U_1\sqrt{\frac{T_2}{T_1}}=U_1\sqrt{\frac{1200}{300}}=U_1\times 2$

r.m.s velocity will be doubled.