Answer to Question #330259 in Molecular Physics | Thermodynamics for Rishellino Maitum

Question

A tank contains 80 of air at a pressure of 350 psi; If the air is cooled until its pressure and temperature decreases to 200 psi and 80F respectively, what is the decrease in internal energy in Btu.

Answer 1

$∆U=(p_1-p_2)V=12000~BTU.$