4 In a cyclic, a working fluid engages in work interactions: 15KJ from the fluid and 35KJ and 40KJ to the fluid and two heat interactions: 20KJ to the fluid and 35KJ from the fluid. Calculate the heat transfer from or to the system.

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4 In a cyclic, a working fluid engages in work interactions: 15KJ from the fluid and 35KJ and
40KJ to the fluid and two heat interactions: 20KJ to the fluid and 35KJ from the fluid. Calculate
the heat transfer from or to the system.
5 A system undergoes a cycle comprising four processes. The heat transfers in each process are:
Qab =720KJ, Qbc = -80KJ, Qcd = 40KJ, Qad = -640KJ. The respective work transfers are: Wab = -
90KJ, Wbc = -50KJ, Wcd= 130KJ. Determine the work interaction during the process d-a.
Transcribed Image Text:4 In a cyclic, a working fluid engages in work interactions: 15KJ from the fluid and 35KJ and 40KJ to the fluid and two heat interactions: 20KJ to the fluid and 35KJ from the fluid. Calculate the heat transfer from or to the system. 5 A system undergoes a cycle comprising four processes. The heat transfers in each process are: Qab =720KJ, Qbc = -80KJ, Qcd = 40KJ, Qad = -640KJ. The respective work transfers are: Wab = - 90KJ, Wbc = -50KJ, Wcd= 130KJ. Determine the work interaction during the process d-a.
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