50. Engine A receives three times more input heat, produces fi ve timesmore work, and rejects two times more heat than engine B. Find the effi -ciency of (a) engine A and (b) engine B.
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50. Engine A receives three times more input heat, produces fi ve times
more work, and rejects two times more heat than engine B. Find the effi -
ciency of (a) engine A and (b) engine B.
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- A particular heat engine has a mechanical power output of 4.20 kW and an efficiency of 26.0%. The engine expels 8.15 103 J of exhaust energy in each cycle. (a) Find the energy taken in during each cycle. KJ (b) Find the time interval for each cycle. sD) How much work does this engine do ln one cycle? 3- A gas is compressed at a constant pressure of 1.2 Pa from 0.008 m³ to 0.002 m3. In the process, 130 J of energy leaves the gas by heat. (a) What is the work done on the gas? (b) What is the change in its internal energy?A heat engine absorvs 180KJ of heat from the hot reservior, and exhaustw 80KJ of heat to the cold reservoir and generates 100kJ of work each cycle. The hot reservoir is mantained at 350 Celsius and the cold reservoir is mantained at 20 degrees celcius. What is the effeciency of the heat engine?
- Calculate the net work output of a heat engine following path ABCDA in the figure below, where V1 = 2.6 ✕ 10−3 m3 and V2 = 10.4 ✕ 10−3 m3.53. What is the decrease in entropy of 25.0 g of water that condenses on a bathroom mirror at a temperature of 35.0° C, assuming no change in temperature and given the latent heat of vaporization to be 2450 kJ/kg?3. A diesel engine performs 2200 J of mechanical work and discards 4300 J of heat each cycle. (i) How much heat must be supplied to the engine in each cycle? (ii) What is the thermal efficiency of the engine?
- Determine the COP of a refrigerator that removes heat from the food compartment at a rate of 5040 kJ/h for each kW of power it consumes. Also, determine the rate of heat rejection to the outside air.3. A diesel engine performs 2200 J of mechanical work and discards 4300 J of heat each cycle. (a) How much heat must be supplied to the engine in each cycle? (b) What is the thermal efficiency of the engine?(a) What is the efficiency (in percent) of a cyclical heat engine in which 45.0 kJ of heat transfer occurs to the environment for every 65.0 kJ of heat transfer into the engine? % (b) How much work (in k) does it produce for 950 kJ of heat transfer into the engine? kJ Additional Materials CSScanned with CamScanner TPeadina