Question

A box contains n molecules of a gas. How will the pressure of the gas be effected, if the number of molecules is made 2n

• A. Pressure will decrease
• B. Pressure will remain unchanged
• C. Pressure will be doubled
• D. Pressure will become three times

Answer 1

Answer: (C)

Pressure will be doubled

Answer 2

If number of molecules in gas increases then number of collision of molecules with walls of container would also increase and hence the pressure increases i.e., P µ N.

Ž $\frac{P_{2}}{P_{1}} = \frac{N_{2}}{N_{1}} = \frac{2}{1}$ Ž $P_{2} = 2P_{1}$