$5-34$E $R-134$a contained in a rigid vessel is heated. The heat transfer is to be determined. T$2=100$F

Assumptions $1$ The system is stationary and thus the kinetic and potential energy changes are zero. $2$ There are no work interactions involved $3$ The thermal energy stored in the vessel itself is negligible.

Analysis We take R$-134$a as the system. This is a closed system since no mass enters or leaves. The energy balance for this stationary closed system can be expressed as