Two tanks are connected by a valve and line as shown below. The volumes are both 1 m3. Tank A contains R-134a at 20°C, quality 15% and tank B is evacuated. The valve is opened and saturated vapor flows from A to B until the pressure become equal. The process occurs slowly enough that all temperature stay at 20°C during the process. Find the total heat transfer to the R-134a during
the process.