Question

A vessel is filled with a gas at a pressure of 76 cm of mercury at a certain temperature. The mass of the gas is increased by 50 % by introducing more gas in the vessel at the same temperature. The resultant pressure, in cm of Hg, is –

• A. 76
• B. 152
• C. 114
• D. 1117

Answer 1

Answer: (C)

114

Answer 2

P µ m

Since m is increased by a factor of $\frac{3}{2}$,

therefore, P will increase by a factor of $\frac{3}{2}$.

\ New pressure = $\frac{3}{2}$ × 76 cm of Hg = 114 cm of Hg.