Air is compressed steadily by a compressor from 14.7 psi and 77 °F to 90psi and 320 °F at a rate of 3.5 lbm/min. During this process, some heattransfer takes place between the compressor and the surrounding mediumresulting in a rate of entropy change in the air.a) Determine the total rate of entropy change in the air during thisprocess. Assume variable specific heat. (R = 0.06855 Btu/lbm·R)b) Draw the process that air undergoes on a T-s diagram. Label thefollowing:i. The location of the initial and final states of airii. The starting and ending temperatures of air

Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
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Air is compressed steadily by a compressor from 14.7 psi and 77 °F to 90
psi and 320 °F at a rate of 3.5 lbm/min. During this process, some heat
transfer takes place between the compressor and the surrounding medium
resulting in a rate of entropy change in the air.
a) Determine the total rate of entropy change in the air during this
process. Assume variable specific heat. (R = 0.06855 Btu/lbm·R)
b) Draw the process that air undergoes on a T-s diagram. Label the
following:
i. The location of the initial and final states of air
ii. The starting and ending temperatures of air

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