Which of the following thermodynamic processes are impossible? Assume an ideal gas process. Choose as many as apply.

Which one of the following statements about an ideal gas is true? During an isochoric process, the change in internal energy of the gas is exactly equal to the amount of heat flow into or out of the gas During an isothermal process, the entropy of the gas does not change. During an isothermal process, no heat enters or leaves the gas. During an adiabatic process, the temperature of the gas does not change. During an isobaric process, no work is done on or by the gas. oooo

12.

i dont understand this

An ideal gas undergoes the thermodynamic process shown in the ??PV diagram in the figure. Determine whether each of the values (a) Δ?ΔU, (b) ?W, (c) ?Q for the gas is positive, negative, or zero. (Note that ?W is the work done ??on the gas.) Hint: First use the ideal gas law to find the initial and final temperatures in terms of ?0P0 and ?0V0 and determine if the final temperature is greater than, less than, or equal to the initial temperature.   (a) ΔU A.+ B.- C.0   (b) W A.+ B.- C.0   (c) Q A.+ B.- C.0