Question #134245

10 kg of water is placed in an enclosed volume of 3m³.Heat is added until the temperature is 250°C.For the final state; A) the pressure is? B) the mass of vapour is? C) the enthalpy of the vapour is?

Expert's answer

a) We use the table of saturated water - temperature . In the quality region the pressure as

b) To find the mass of the vapor we must determine the quality. We use the next equation-

Then,

Using the relationship of-

we find the vapor mass

To find the enthalpy of the vapor-

Using the relationships

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