A frictionless piston-cylinder device initially contains steam at 200 kPa, 200oC and 0.5 m3. At this state, a linear spring (F ∝ x) is touching the piston but exerts no force on it. Heat is now slowly transferred to the steam, causing the pressure and the volume to rise to 500 kPa and 0.6 m3, respectively.(adsbygoogle = window.adsbygoogle || []).push({});

Calculate the work done, final temperature and the total heat transferred.

I've been given a superheated water table.

I've calculated work done to be -113.5kJ

But I'm not sure how to calculate the final temperature and total heat transferred.

For the total heat transferred I know that q = du + w. That would require me to know the change in internal energy but I can't calculate that without knowing the final temperature (i think?).

OR

is this is an isothermal process which means that the final temperature is 200oC and heat transferred is -113.5kJ?

Thanks for your help...

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# Homework Help: Thermodynamics question

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