Question

An open vessel containing air is heated from 27$^\circ$C to 127$^\circ$C. The fraction of air originally present which goes out of it is

• A. 44624
• B. 44565
• C. 44595
• D. 44569

Answer 1

Answer: (B)

44565

Answer 2

$\frac{V_{1}}{T_{1}}=\frac{V_{2}}{T_{2}}$ initial fraction $\frac{V_{1}}{V_{2}}=1$ when temp. is $27^{\circ} C$ At $127^{*} C$, the new fraction is $\frac{V_{1}}{V_{2}}=\frac{300}{400}=\frac{3}{4}$ $\therefore$ Air expelled $=1-\frac{3}{4}=\frac{1}{4}$