Chemistry 122 c

Question

A gas has a volume of 13.7 L at a temperature of 50•C. What is the volume at 175•C! (If all other parameters are held constant?

Answer 1

Look and see what you are given, and what you are being asked to solved for. You really need to understand how to do these problems by yourself.

Given:

Initial volume = V1 = 13.7 L

Initial temperature T1 = 50ºC + 273 = 323K (ALWAYS USE TEMPERATURE IN KELVIN, NOT C)

Final temperature T2 = 175ºC + 273 = 448K

Asked for:

Find final volume V2 = ?

You should memorize the Combined Gas Law which is P1V1/T1 = P2V2/T2 and since we aren't given any pressures (P) we can remove that from the equation, and we are left with V1/T1 = V2/T2. We can now plug in the values we know, and solve for the final volume, V2. Easy, right?

13.7 L / 323K = V2 / 448K

V2 = (13.7 L)(448K) / 323K = 19.0 L