air is contained in a variable load piston device equipped with a paddle wheel. initially, air is at 500kPa and 27掳C. the paddle wheel is now turned by an external electric motor until 50 kJ/kg of work has been transferred to air. during this process, heat is transferred to maintain a constant air temperature while allowing the gas volume to triple.
calculate the amount of heat transfer in kJ/kg.|||use the Pearson's chi square test
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