Question

flask X contain 1 dm3 of helium at 2 kPa and flask Y contain 2 dm3 of neon at 1 Kpa pressure.
If the flask are connected at constant temperature. what is the final pressure ? ​

Answer 1

Answer:

partial pressures added gives 3 kPa... but the correct answer is different.

P1*V1 = P2*V2

P2 = P1*V1/V2

The final volume

= 15L

The partial pressure of the helium decreases to

12*5/15 = 4kPa

The partial pressure of the neon to

6*10/15 = 4kPa

Then the final pressure will be the sum of to partial pressure

8kPa .

The Boyle's Law formula for the final pressure is: P2 = V1•P1 / V2. where: V1 is the initial volume of the gas. P1 is the initial pressure of the gas.

Explanation:

I hope this has been helpful for you.