a rigid tank contains 2kg of saturated liquid-vapor mixture of water at 250kPa. Initially, three-quarters of the mass is in the liquid phase. an electric resistor placed in the tank is connected to a 110 volt source and a current of 9 amp flows through the resistor when the switch is turned on. Assuming an adiabetic process, determine how long it will take to vaporize (saturated vapor) all the liquid in the tank.

Ten pounds of water at 35oF, and 6.00 lb of steam at 250oF and 20 psia are mixed together in a container of fixed volume. What is the final temperature of the mixture? How much steam condense? Assume that the volume of the vessel is constant with a value equal to the volume of the steam and that the vessel is insulated.

A piston-cylinder device contains satuated water vapor with a constant pressure. The mass and the pressure are listed in the table below. The water is heated by a resistance heater (see the picture below) within the cylinder. The heat supplied by the heater is given in the table below. The cylinder is insulated so there is not heat loss. (a) Determine the enthalpy per unit mass after the water vapor received heat. (b) Determine the temparature after the water vaopr received heat. Parameter Pressure Mass of water Heat supplied by the heater Unit kPa g KJ Value 300 26 7.1 heater

How much energy (BTU) is given off when 5 lbm of saturated steam with a quality of  x=1 at 1 psia?  How does this compare with the same mass condensing at atmospheric conditions?.

Refrigerant-134a Saturated vapor Saturated liquid A tank occupied by saturated liquid-vapor mixture of refrigerant-134a at 1.8 MPa. If the fraction of the total volume occupied by vapor (Vsaturate vapor/Vtotal) is 0.96, determine quality of the mixture. Present your result cent. (For example, if you find 0.952, enter your result to system as 95.2)