13 How much work does a gas do when it expands against a con

13. How much work does a gas do when it expands against a constant pressure of 0.750 atm from a volume of 40.00 mL to a volume of 275.00 mL? (101.3 J = 1 L-atm) +17.9J b +17.9kJ e-17.9 kJ -1.74J

Solution

13) answer : b) 17.9 kJ

volume V1 = 40 mL

volume V2 = 275.00 mL

pressure = 0.750 atm

work = p dV

        = 0.750 (V2 - V1)

        = 0.750 x (275 - 40)

work = 176.25 L.atm

        = 176.25 x 101.3

       = 17854 J

work = + 17.9 kJ