Question

At a constant temperature the pressure of a gas is 940 mm Hg. What will be its pressure if the volume of gas is decreased by 20%

Chemistry Study of Gas Laws ​

Answer 1

Answer:

volume of gas increases by 25%

Explanation:

ANSWER

Ideal gas equation states that: PV=nRT

As temperature remains constant, so PV= constant =k

As pressure decreases by 20% so P

2

=0.8P

⇒PV=(0.8P)V

2

⇒V

2

=

0.8P

PV

=

0.8

V

=1.25V

So volume of gas increases by 25%.