500 J of work is done on a gas in a process that decreases the system's thermal energy by 300 J. A. During this process: a. Heat is absorbed by the system b. Heat is released by the system c. No heat is exchanged B. How much energy (in J) is transferred to the system as heat? Write your answer in joules. (Hint: Check the text to see how the signs of , , and are defined.) C. Is the gas expanding or contracting? a. Expanding b. Contracting D. Which of the following ideal-gas processes could this process be? Choose all that apply. a. Isobaric b. Isochoric c. Isothermal d. Adiabatic