# Answer to Question #16990 in Physical Chemistry for nasiha zahari

Question #16990

a sample of 9 g of methane (CH4) occupies a volume of 15.4 L at 37 C.

calculate the work done when the gas expands isothermally into a vacuuum space.

what are the equation we should use?

calculate the work done when the gas expands isothermally into a vacuuum space.

what are the equation we should use?

Expert's answer

w=-RT ln (V2/V1)=RT ln (P2/P1)

PV=nRT

n=9/16=0.5625

mol

P=nRT/V=0.5625*8.31*310 / 15.4 =94.095 kPa

w=-RT ln (V2/V1)=RT

ln (P2/P1)

PV=nRT

n=9/16=0.5625

mol

P=nRT/V=0.5625*8.31*310 / 15.4 =94.095 kPa

w=-RT ln (V2/V1)=RT

ln (P2/P1)

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