Thermodynamics First Law Practice Problem Solutions 1. The diameter of the balloon is measured and found to be 0.13 m. Determine the boundary work, heat transfer, and final balloon diameter.
Italicized values are from ideal gas relations.
Bold values are calculated. We begin by evaluating the properties at state 1 and state 2 by using the air tables and the ideal gas law. We can then use our boundary work equation to calculate the boundary work. Finally, we use the conservation of energy to determine the heat transfer. We start by determining our total volume at state 1.