Question

A gas at 4 bar and 400 K occupies a volume of 1m3.
After its expansion its volume and temperature
become 4m3 and 300 K respectively. The final pressure
of the gas would be:
(1) 0.50 bar (2) 0.60 bar
(3) 0.75 bar (4) 1.25 bar

Answer 1

P1V1/T1=P2V2/T2
We have to find P2
so by cross multiplication
P1V1T2=P2V2T1
P2=P1V1T2/V2T1
putting the values
P2=4(1)(400)/(4)(300)
P2=1600/1200
P2=16/12
P2=8/6
P2=4/3

I think d is correct option.