Question

A cylinder containing $1 \mathrm{~kg}$ of ammonia has an externally loaded piston. Initially the ammonia is at $2 \mathrm{MPa}$ and $180^{\circ} \mathrm{C}$. It is now cooled to saturated vapor at $40^{\circ} \mathrm{C}$ and then further cooled to $20^{\circ} \mathrm{C},$ at which point the quality is $50 \% .$ Find the total work and the heat transfer for the process, assuming a piecewise linear variation of $P$ versus $V$.

Name: A cylinder containing 1 kg of ammonia has an externally loaded piston. Initially the ammonia is at 2 MPa and 180^∘C. It is now cooled to saturated vapor at 40^∘C and then further cooled to 20^∘C, at which point the quality is 50 % . Find the total work and the heat transfer for the process, assuming a piecewise linear variation of P versus V.
Uploaded: 2023-01-02T06:34:16-08:00
Duration: 2 min 24 s
Channel: Sri K
Description: A cylinder containing 1 kg of ammonia has an externally loaded piston. Initially the ammonia is at 2 MPa and 180^∘C. It is now cooled to saturated vapor at 40^∘C and then further cooled to 20^∘C, at which point the quality is 50 % . Find the total work and the heat transfer for the process, assuming a piecewise linear variation of P versus V.

          A cylinder containing $1 \mathrm{~kg}$ of ammonia has an externally loaded piston. Initially the ammonia is at $2 \mathrm{MPa}$ and $180^{\circ} \mathrm{C}$. It is now cooled to saturated vapor at $40^{\circ} \mathrm{C}$ and then further cooled to $20^{\circ} \mathrm{C},$ at which point the quality is $50 \% .$ Find the total work and the heat transfer for the process, assuming a piecewise linear variation of $P$ versus $V$.

Added by Melissa F.

University Physics with Modern Physics

Hugh D. Young 14th Edition

Instant Answer

Solved by Expert Sri K

01/02/2023

Step 1

Find the work done by the external piston: $W = P(V - v_p)$ Show more…

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A cylinder containing $1 \mathrm{~kg}$ of ammonia has an externally loaded piston. Initially the ammonia is at $2 \mathrm{MPa}$ and $180^{\circ} \mathrm{C}$. It is now cooled to saturated vapor at $40^{\circ} \mathrm{C}$ and then further cooled to $20^{\circ} \mathrm{C},$ at which point the quality is $50 \% .$ Find the total work and the heat transfer for the process, assuming a piecewise linear variation of $P$ versus $V$.