Question

A sample of gas has a pressure of 3.2 atmospheres at a temperature of 301 Kelvin. What would be the pressure of the same sample of gas when the temperature is decreased to 285 Kelvin? Show all of the work used to solve this problem.

Answer 1

So we can apply the combined gas law here which is P1V1/T1 = P2V2/T2
P1= 3.2atm
P2=?
T=301K
T2=285K

3.2atm/301K = P2/285K

P2=3.0299atm

Answer 2

P1/T1=P2/T2 Gay Lussac's Law

3.2/301=P2/285

P2= 3.0 atm (3.0299003322 rounded to 2 sig figs)