Q 28

The gas in a perfectly insulated system does work at a rate of 13 W.At what rate is the internal (thermal)energy of the gas changing?
A) -13 W
B) 13 W
C) 0.00 W
D) 6.5 W

Q 29

An ideal gas is allowed to expand slowly at constant temperature to twice its original volume. During the expansion,the gas absorbs 200 kJ of heat.
(a)What is the change in the internal (thermal)energy of the gas during the expansion?
(b)How much work does the gas do during the expansion?

Q 30

An ideal gas initially at 300 K and occupying a volume of 20 L is adiabatically compressed.If its final temperature is 400 K and γ = 1.30,what is its final volume?
A) 7.7 L
B) 14 L
C) 22 L
D) 52 L