Question

If temperature is changed from $27{}^{\circ }C$ to $327{}^{\circ }C$ . The ratio of K.E. molecules at two temperatures:

• A. 3 : 1
• B. 2 : 3
• C. 2 : 1
• D. 1 : 2

Answer 1

Answer: (D)

$E_k=\frac{3}{2}kT$ or $E_k\propto T$ Hence $\frac{E_{k_1}}{E_{k_2}}=\frac{T_1}{T_2}=\frac{(27+273)}{(327+273)}=\frac{300}{600}=\frac{1}{2}$ so the ratio =1:2