Question: how do we know to neglect KE and PE for this 3.97 Helium gas expands from 125 kPa, 350 K and 0.25 m' to 100

how do we know to neglect KE and PE for this

3.97 Helium gas expands from 125 kPa, 350 K and 0.25 m' to 100 kPa in a polytrop process with n = 1.667. How much heat transfer is involved

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