One kilogram of steam is placed in a piston-cylinder device, initially at P = 1 bar and T = 100°C. The steam is heated at constant pressure to T = 200°C.

A. Find the heat and work for this process. Obtain all needed data from the steam tables.

B. Find the heat and work for this process. Use the ideal gas law and the ideal gas heat capacity for steam, located in Appendix D. How far off are your answers compared to part A?

C. Suppose in part A you had overlooked the fact that the steam expands when heated, and assumed that work was negligible. How far off would your answers for Q have been?