1. [-/3 Points] DETAILS MY NOTES SERPSE10 21.1.0P.003. ASK YOUR TEACHER PRACTICE ANOTHER In one cycle, a heat engine absorbs 1.72 k] from a hot reservoir at 277C and expels 1.16 k] to a cold reservoir at 27C. (@) What is the engine's thermal efficiency (in percent)? 1% (b) How much work is done by the engine (in J) in each cycle? e J ] (c) What is the engine's power output {in kW) if each cycle lasts 0.302 s? ( _] kW L Need Help? 2. [-/2 Points] DETAILS MY NOTES SERPSE10 21.2.0P.005. ASK YOUR TEACHER PRACTICE ANOTHER A refrigerator has a coefficient of performance equal to 6.00. The refrigerator takes in 135 J of energy from a cold reservoir in each cycle. (@) Find the work required in each cycle. ( 13 J (b) Find the energy expelled to the hot reservoir. ( 3 | ] J Need Help? Submit Answer 3. [-/2 Points] DETAILS MY NOTES SERPSE10 21.2.0P.008. ASK YOUR TEACHER PRACTICE ANOTHER (a) A freezer maintains an interior temperature inside of 24.0C and has a coefficient of performance of 3.00. The freezer sits in a room with a temperature of 16.0C. The freezer is able to completely convert 26.0 g of liquid water at 16.0C to ice at 24.0C in one minute. What input power (in watts) does the freezer require? (The specific heat of liquid water is 4.186 1/(g - C), the specific heat of ice is 2.090 J/(g - C), and the latent heat of fusion of water is 334 J/g.) W - (b) What If? In reality, only part of the power consumption of a freezer is used to make ice. The remainder is used to maintain the temperature of the rest of the freezer. Suppose, however, that 100% of a freezer's typical power consumption of 160 W is available to make ice. The freezer has the same coefficient of performance as given above. How many grams per minute of water at 16.0C could this freezer convert to ice at 24.0C? g/min Need Help? Submit