Answer to Question #153587 in Mechanical Engineering for Rhemark Lava

Question #153587

A closed system executes a series of processes for which two of the three quantities W, Q and ΔU are given for each process. Find the value of the unknown quantity in each case.

a) W = + 10 Hp , Q = + 500 KJ/min, ΔU = ?

b) W = 65 KJ, Q =?, ΔU= -25 KJ

c) W = ?, Q = + 25KJ, ΔU = 0 


1
Expert's answer
2021-01-06T06:04:56-0500

a)- "Q = w + \\Delta U"

"8333.33 = 7460 + \\Delta U"

"\\Delta U = 873.33 W"


b)- "Q = w + \\Delta U"

"Q = 65-25"

= 40 KJ


c)- "Q = w + \\Delta U"

"25 = W +0"

"W = 25"



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