Answer to Question #166139 in General Chemistry for Enhui peng

Question

A sample of Argon has a volume of 3.2 L and the pressure is 0.9 atm. If the final temperature is 34 c, the final volume is 1 L, and the final pressure is 6 atm, what was the initial temperature of the argon in Kelvin?

Answer 1

Combined gas law:

P₁V₁/T₁=P₂V₂/T₂ ;

P₁=0.9 atm

V₁=3.2 L

T₁ -- ?

P₂=6 atm

V₂=1 L

T₂=34 ^oC= 307 K

T₁=P₁V₁T₂/P₂V₂=0.9*3.2*307/(6*1)=147.36 K

Answer: the initial temperature of the argon was 147.36 K