Question: A 2-m3 insulated vessel, shown in Fig. P6.121 contains saturated vapor steam at 4 MPa. A valve on the top of the tank is opened,

A 2-m3 insulated vessel, shown in Fig. P6.121 contains saturated vapor steam at 4 MPa. A valve on the top of the tank is opened, and steam is allowed to escape. During the process any liquid formed collects at the bottom of the vessel, so that only saturated vapor exits. Calculate the total mass that has escaped when the pressure inside reaches 1 MPa.

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