A rigid tank with 0.5 kg ammonia at 1600 kPa, 160◦C is cooled in a reversible process by giving heat to a reversible heat engine that has its cold side at ambient temperature, 20◦C, shown in Fig. P6.186. The ammonia eventually reaches 20◦C and the process stops. Find the heat transfer from the ammonia to the heat engine and the work output of the heat engine.

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C.V. total W Ambient NH3 НЕ Он FIGURE P6.186