Question

1.23 moles of neon gas has a volume of 27.6 L at 273 K and 1.00 atm.

What would be the volume of neon gas if the pressure were decreased to 10.1 psi at constant temperature?

a) 2.73 L
b) 19.0 L
c) 0.0527 L
d) 40.2 L
e) 4.29 L

Answer 1

1psi = 0.068atm

10.1psi = 10.1*0.068   = 0.6868atm

no of moles and temperature are constant

initial                                                                      final

P1 = 1                                                                   P2 = 0.6868atm

V1 = 27.6                                                              V2   =

P1V1 = P2V2

V2   = P1V1/P2

          = 1*27.6/0.6868 = 40.186L = 40.2L >>>>>answer -d) 40.2 L