For an isolated system of one mole of He initially at 300 K and a pressure...
For an isolated system of one mole of He initially at 300 K and a pressure of 15 atm expands to a final pressure of 1 atm, and the final temperature of 188 K. During this process, the expansition work is 1.40x103 J. Calculate q, w, ΔE and ΔH
Homework Answers
An isolated system means the system is said to be an Adiabatic system
For an adiabatic system, q = 0
And 
But w = 1.40 x 103 J
Now we have to find 
As the gas expands the temperature decreases so internal energy decreases
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