# A piston-cylinder device initially contains 50L

A piston-cylinder device initially contains 50L of liquid water at 40 degrees C and 200kPa. Heat is transferred to the water at constant pressure until entire liquid is vaporized.

(a) What is the mass of the water?

(b) What is the final temperature?

(c) Determine total enthalpy change.

(d) Show process on a T-v diagram with respect to saturation lines.

https://brainmass.com/engineering/mechanical-engineering/piston-cylinder-device-initially-contains-94322

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Solution

a. At 200 kPa, the saturation temperature is 120.2 0C. This means we have sub-cooled liquid at the start at 400C. The density of ...

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