The heat engine operates according to the Carnot cycle. During isothermal expansion of a diatomic gas, its volume increases by 3 times, and with subsequent adiabatic expansion - by 5 times. Determine the efficiency of the cycle. What work is done by 1 kmol of gas in one cycle if the heater temperature is 300 K? How much heat will the machine receive from the refrigerator if it performs the same cycle in the opposite direction, and how much heat will be transferred to the heater?
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