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Find q, w, AU, and AH if 2.00 g of He(g) with Cym = ¿R
essentially independent of temperature undergoes (a) a re-
versible constant-pressure expansion from 20.0 dm3 to
40.0 dm³ at 0.800 bar; (b) a reversible heating with P going
from 0.600 bar to 0.900 bar while V remains fixed at 15.0 dm³.

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