Question

At a constant temperature, 250 ml of argon at 760 mm pressure and 600 ml of nitrogen at 500 mm pressure are put together in a one litre flask. Calculate the final pressure.

Answer 1

Answer:

490 mm

Explanation:

Given At a constant temperature, 250 ml of argon at 760 mm pressure and 600 ml of nitrogen at 500 mm pressure are put together in a one litre flask. Calculate the final pressure.

We know that

Applying Dalton’s law we get

By partial pressure of each gas we get

P1 (ar) = 250 / 1000 x 760 = 190 mm

P2 (N2) = 600 / 1000 x 500 = 300 mm

So P total will be 190 + 300 = 490 mm