Consider a process that occurs at constant volume. The initial volume of gas is 4.50 L , the initial temperature of the gas is 27.0 °C , and the system is in equilibrium with an external pressure of 1.2 bar (given by the sum of a 1 bar atmospheric pressure and a 0.2 bar pressure due to a brick that rests on top of the piston). The gas is heated slowly until the temperature reaches 52.2 °C . Assume the gas behaves ideally, and its heat capacity at constant volume is: CV, m=14.2J/(K. mol) Remember to use three significant figures for all numerical answers. The margin of error for each numerical answer is 5%. To avoid rounding errors use the unrounded intermediate values in your final calculations. You may not need all the information provided in the problem.

(a) What is the value of w? (think about the sign first)
(b) What is the value of q? (think about the sign first)
(c) Calculate ΔU
(d) Calculate ΔH