Solution: A thermodynamic system is taken from state a to
Chapter 19, Problem 19.38(choose chapter or problem)
A thermodynamic system is taken from state a to state c in Fig. P19.38 along either path abc or path adc. Along path abc, the work W done by the system is 450 J. Along path adc, W is 120 J. The internal energies of each of the four states shown in the figure are \(U_a=150\mathrm{\ J},\ U_b=240\mathrm{\ J},\ U_c=680\mathrm{\ J}\text{, }\text{ and }U_d=330\mathrm{\ J}\). Calculate the heat flow Q for each of the four processes ab, bc, ad, and dc. In each process, does the system absorb or liberate heat?
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