Consider the thermal decomposition of a 41.6 g calcium carbonate (CaCO, molar mass 100.1 g/mol) sample in a cylinder with a movable piston: CaCO3(s) ---> CaO(s) + CO2(g). View the cylinder with the compounds in it as a system. At the beginning of the process, there is no gas in the system, and the piston rests on the reactant's surface. As the reaction progresses, gaseous CO2 evolves and pushes the piston against the atmospheric pressure. Thus, we can consider the pressure in the cylinder constant and equal to the atmospheric pressure. Assuming that the decomposition process occurs at 850C, and the atmospheric pressure is 1.00 atm throughout the experiment, find the contribution of work to the system's internal energy change in the process. Report the result in kJ using 2 significant figures. You may use 1 atm 1L = 101.3 J or the ideal gas constant R = 8.314 J/(mol-K). Answer: