- #1

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My answer :

given data :

v1 = 5.40 l

v2 = 1.23 l

P1 - 1.00

now convert L to m^3 and atm to pa so

1 l =0.001 cubic meters

1 atm = 101,325 pa

v1 = 5.4X10^-3 m^3

v2 = 1.23 X 10^-3 m^3

p = 101325 pa

now DU = -Q - W

w = -pXDv = 101325(1.23 X 10^-3 - 5.4X10^-3 )

w = 422.5 J

now DU = -Q + W

= -128 + 422.5

Du = 294.5 J