Answer to Question #115774 in Mechanical Engineering for Smith

Question #115774
Air initially at 75 psia and 65 0F is compressed to a final pressure of 300 psia and temperature of 320 0F. Find the polytropic exponent for the process.
1
Expert's answer
2020-05-19T09:13:33-0400

Here in the given equation it is given that ,


we know that for polytropic process




4.923=

On taking log both sides


log(4.923)=


0.692n=(n-1)0.602

0.692 n = 0. 602 n - .602

0.09 n= -.602

n= - 6.68 here n is the polytropic exponent

but for real condition polytropic exponent can not be negative




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