Figure depicts the working diagram (P-V graph) of a process corresponding to an ideal gas. Suppose U_A=10J, U_B = 50 J and heat given to the gas during the process BC is 40 J. Determine heat extracted from the system in going from C to A

Figure depicts the working diagram (P-V graph) of a process correspond

1.	Figure depicts the working diagram (P-V graph) of a process corresponding to an ideal gas. Suppose U_A=10J, U_B = 50 J and heat given to the gas during the process BC is 40 J. Determine heat extracted from the system in going from C to A
Answer» Solution :For the process to A, APPLYING FIRST law of thermo-dynamics, we have `Delta Q = Delta U+Delta W = (U_A-U_C) +Delta W =(10-230)J + (0) [:.Delta V = 0,soDelta W =0] =-220J` SINCE, `Delta Q` is-ve heat is actually absorbed from the system. HENCE, heat EXTRACTED = 220J