Question

. At constant temperature, a gas is at a pressure
of 1080 mm Hg. If the volume is decreased
by 40%, find the new pressure of the gas.​

Answer 1

Answer:

1512 mm of hg

Explanation:

V is inversely proportional to P .so when volume decrease by 40% then pressure increase by 40%

Answer 2

Answer:

Answer = 1800 mm of Hg..

Explanation:

now,

Let V1 = V.

therefore,

V2 = 40% of initial volume

=

$= \frac{40}{100} \times v$

= 0.4 V

so,

V2 = V - 0.4

= 0.6 V

now,

P1 = 1080 mm of Hg,

P2 = ?;

V1 = V,

V2 = 0.6V.

therefore,

by Boyle's law,

P1V1 = P2V2

1080 × V = P2 × 0.6 V

$= \frac{1080 \times v}{0.6v}$

by cancelling it,

P2 = 1800 mm of Hg......

hope it helps you.