PRACTICE IT Use the worked example above to help you solve this problem. A balloon contains 5.70 moles of a monatomic ideal gas. As energy is added to the system by heat (say, by absorption from the Sun), the volume increases by 25% at a constant temperature of 35.0.C. Find the work W, done by the gas in expanding the balloon, the thermal energy @ transferred to the gas, and the work W done on the gas. env Q = n W = EXERCISE HINTS: GETTING STARTED | I'M STUCK! Suppose that subsequent to this heating, 1.80 x 10* J of thermal energy is removed from the gas isothermally. Find the final volume in terms of the initial volume of the example, V . (Hint: Follow the same steps as in the example, but in reverse. Use the values in the Practice It section. Also note that the initial volume in this exercise is 1.25V.) x Vo