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Calculate DU and DH for each of the following changes of state in 2 moles of...

Calculate DU and DH for each of the following changes of state in 2 moles of an ideal gas with Cv= 3R/2:

a) (1.5 atm, 400 K) --> (3 atm, 800 K)

b) (2.5 atm, 20 L) --> (1 atm, 30 L)

c) (2 L, 400 K) --> (0.4 L, 400 K).

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