Consider a system containing a helium gas that undergoes the process A→B→C as described in the figure below. Determine the heat needed or removed for i) process A→B and ii) process B→C.

• A. i. heat removed = -304 J, ii. heat needed = 507J
• B. i. heat removed = -403 J, ii. heat needed = 507 J
• C. i. heat removed = -305 J, ii. heat needed = 705 J
• D. i. heat removed = -403 J, ii. heat needed = 705 J

Answer: (A)