Question

Given three cylinders containing O2 gas at the same volume and pressure. Cylinder A is at -10 ∘C, cylinder B is at -5 ∘F, cylinder C is at 255 K. Which cylinder contains the largest mass of oxygen?

cylinder A

cylinder B

cylinder C

All cylinders contain the same mass of O2.

Answer 1

Lets convert all temperatures in kelvin

Cylinder A:

Given:

C = -10.0 oC

use:

K = C + 273.15

K = -10.0 + 273.15

K = 263.15 K

Cylinder B:

Given:

F = -5.0 F

use:

K = (F - 32) * 5/9 + 273.15

K = (-5.0 - 32) * 5/9 + 273.15

K = 252.6 k

Cylinder C:

K = 255 K

use:

P*V = n*R*T

greater T implies smaller number of mol which in turn means smaller mass

So, largest mass will go with that cylinder which has smaller temperature in kelvin

Cylinder B has smallest temperature

Hence it will have largest mass

Answer: Cylinder B