Question

The temperature, pressure and volume of two gases X and Y are T, P and V respectively. When the gases are mixed then the volume and temperature of mixture become V and T respectively. The pressure and mass of the mixture will be

• A. (a) 2P and 2M
• B. P and M
• C. P and 2M
• D. 2P and M

Answer 1

Answer: (B)

P and M

Answer 2

As the quantity of gas remains constant $\mu_{A} + \mu_{B} = \mu$

$\frac{P_{A}V_{A}}{RT} + \frac{P_{B}V_{B}}{RT} = \frac{P(V_{A} + V_{B})}{RT}$

⇒ $P = \frac{P_{A}V_{A} + P_{B}V_{B}}{V_{A} + V_{B}} = \frac{1.4 \times 0.1 + 0.7 \times 0.15}{0.1 + 0.15}$

⇒ $P = 0.98MPa$.