A sample of oxygen gas occupies a volume of 230 cm3 at 101° C. What will be volume of oxygen when the temperature drops to - 15° C ?

Question

Please explain how you got the answer, thank you

Answer 1

When working with gases, you should always convert temperature to Kelvin.

101ºC + 273 = 374K

-15ºC + 273 = 258K

Assuming constant pressure, we are dealing with Charles' Law:

V1/T1 = V2/T2

230 cm³/374K = V2/258K

V2 = 159 cm³