Sapp Bros. overfilled your propane tank. It has a mass of $20lbm,$ and is now at $60F$ and $180a.$ What is the

volume of the tank? Answer: less than $0\mathrm{.}65f{t}^3.$

In an industrial process, $30kg$ of ammonia is initially at $-2C$ and $\frac{7}{b}ar.$ At the end of the process the ammonia is at

$40C$ and $8$ bar. Considering the ammonia as the system, if the amount of work done in the process was $5000kJ,$

how much heat was added in the process? Answer: over $40MJ.$