A toy balloon is initially at a temperature of T = 15o C. Its initial volume is 0.0042 m3 (It is a 10 cm radius sphere). Assume that the pressure in the balloon always equals atmospheric pressure, 101.3 kPa.
1)The balloon is lying in the sun, which causes the volume to expand by 13%. What is the new temperature, T?
2) By how many Joules did the internal energy of the gas in the balloon increase? Air is almost entirely diatomic gas.
3) How much work was done by the gas during the expansion?
4) How much heat was added to the gas by the Sun?