Question 1
In which case is the work done on the system always positive?
◦ Δ
V = 0
◦ Δ
V < 0
◦ Δ
V > 0
◦ Δ
E > 0
Question 2
Calculate the work energy,
w, gained or lost by the system when a gas expands from 20 L to 35 L against a constant external pressure of 2.0 atm. [1 L ∙ atm = 101 J]
◦ -3.0 kJ
◦ +3.0 kJ
◦ +5.3 kJ
◦ -5.3 kJ