Sherry had 13.5 liters of oxygen gas measured at 25 degrees Celsius. She took that the gas outdoors where it was 10 degrees Celsius. Volume of the gas afterward

Question

You must find the volume of the gas after she moved it outdoors. Remember volume at room temperature measures in STP...

273Kelvin...

Answer 1

You have volume 1 (V1) which is 13.5 liters.

You have temperature 1 (T1) which is 25ºC.  Change this to K = 25 = 273 = 298 K

You have temperature 2 (T2) which is 10ºC.  Change this to K = 10 + 273 = 283 K

You are asked to find volume 2 (V2).  This assumes that the pressure (P) is constant, i.e. same indoors and outside.

This involves Charles' Law

V1/T1 = V2/T2

13.5 L/298 K = V2/283 K

V2 = (13.5 L)(283 K)/298K

V2 = 12.8 liters