Question

A gas occupies 750 ml at S.T.P. Find the volume occupied by the gas when its pressure is
500 mm of Hg and its temperature is 20°C.
​

Answer 1

ANSWER

V

1

=700 ml

P

1

=1 atm=760 mm Hg

T

1

=298 K V

2

=?

P

2

=400 mm Hg

T

1

=288 K

Here number of moles is constant.

∴

T

1

P

1

V

1

=

T

2

P

2

V

2

V

2

=

T

1

×P

2

P

1

×V

1

×T

2

=

298×400

760×700×288

=1285.37 ml

∴ Volume occupied by gas is 1285.37 ml.

Explanation:

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