Ten grams of water at 15C and 100 kPa completely fills a balloon. The balloon is then heated on the stove top at constant pressure until the temperature reaches 125C. Determine the boundary work in kJ involved in this process.
Italicized values are from steam tables.
Bold values are calculated. So to perform this calculation we will need to determine the two specific volumes. At state 1, we know the pressure and temperature so that the state is fixed. Going to the saturation pressure table we find at 100kPa so we have subcooled liquid. But our pressure is too low to use the compressed liquid tables, so we must treat our liquid water as an incompressible substance.