Question

125 ml of gas A at 0.60 atmosphere and 150 ml of gas B at 0.80 atmosphere pressure at same temperature is filled in a vessel of 1 litre volume. What will be the total pressure of mixture at the same temperature

• A. 0.140 atmosphere
• B. 0.120 atmosphere
• C. 0.195 atmosphere
• D. 0.212 atmosphere

Answer 1

Answer: (C)

0.195 atmosphere

Answer 2

Pressure of gas A, $P_{A} = \frac{125 \times 0.6}{1000} = 0.075atm$

Pressure of gas B, $P_{B} = \frac{150 \times 0.8}{100} = 0.120atm$

Hence, by using Dalton's law of pressure

$P_{mixture} = P_{A} + P_{B} = 0.075 + 0.120 = 0.195atm$