The given question is incomplete. The complete question is as follows.
A 0.6-m3 rigid tank is filled with saturated liquid water at 135°C. A valve at the bottom of the tank is now opened, and one-half of the total mass is withdrawn from the tank in liquid form. Heat is transferred to water from a source of 210°C so that the temperature in the tank remains constant. Assume the surroundings to be at 25°C and 100 kPa. Determine the amount of heat transfer.
Explanation:
First, we will determine the initial mass from given volume and specific volume as follows.
=
= 558.14 kg
Hence, the final mass and mass that has left the tank are as follows.
=
= 279.07 kg
Now, the final specific volume is as follows.
=
= 0.00215
Final quality of the mixture is determined actually from the total final specific volume and the specific volumes of the constituents for the given temperature are as follows.
=
=
Hence, the final internal energy will be calculated as follows.
=
= 571.06 kJ/kg
Now, we will calculate the heat transfer as follows.
Q =
= 1113.5 kJ
Thus, we can conclude that amount of heat transfer is 1113.5 kJ.