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6.15 Recall that the work in gas expansion is equal to the product of the external, opposing pressure and the
change in volume.
(a) w = −PΔV
w = −(0)(5.4 − 1.6)L = 0
(b) w = −PΔV
w = −(0.80 atm)(5.4 − 1.6)L = −3.0 L⋅atm
To convert the answer to joules, we write
3.0 L atm 101.3 J
1 L atm
= − ⋅ × =
⋅
w − 3.0 × 102 J
(c) w = −PΔV
w = −(3.7 atm)(5.4 − 1.6)L = −14 L⋅atm
To convert the answer to joules, we write
14 L atm 101.3 J
1 L atm
= − ⋅ × =
⋅
w −1.4 × 103 J