Question

A sample of chlorine gas contracts from 550 mL to 376 mL when it is cooled from 63 °C to 12 °C. If the initial pressure of the chlorine was 725 torr, what is the final pressure of the chlorine?

Answer 1

we need to use the ideal gas formula. P1V1/T1= P2V2/T2

P1= 725 torr
V1= 550 mL
T1= 63 C= 336 K
P2= ?
V2= 376 mL
T2= 12 C= 285 K

(725 x 550)/(336)= (P2 x 376)/ (285K)

1190 = P2 x 1.32

P2= 900 torr