(II) How much less per year would it cost a family to operatea heat pump that has a coefficient of performance of 2.9 thanan electric heater that costs $2000 to heat their home for ayear? If the conversion to the heat pump costs $15,000, howlong would it take the family to break even on heating costs?How much would the family save in 20 years?

Q: A heat engine is required to work at 80 per cent efficiency. At what temperature must the hot source…

A: Given data: Efficiency of heat engine,η=80%=0.8 Temperature of the cold sink, T2=20C = 273+20 = 293…

Q: Exactly 367 grams of ice are melted at a temperature of 55°C (Lịce-333 J/g ). Find the change in…

A: Solution,  Given that,  Temperature T = 55° C = 55 +273 = 328 K Heat Q= 330×367 J We know that, the…

Q: Exactly 738 grams of ice are melted at a temperature of 60'C (Lice"333g) Find the change in entropy…

A:

Q: discards

A:

Q: A heat pump has a coefficient of performance equal to 4.15 and requires a power of 1.61 kW to…

A: Given:Co-efficient of performance, Bh = 4.15Poer, P = 1.61 kW

Q: What is Carnot efficiency Of a heat engine operating between the temperatures of 153°C And 19°C Give…

A: Carnot efficiency η=1-TCTH

Q: A heat pump maintains a dwelling at 68°F. When operating steadily, the power input to the heat pump…

A: Coefficient of performance of heat pump is given by COP=Q1Win Where Q1,Win are heat transferred to…

Q: (a) What is the efficiency (in percent) of a cyclical heat engine in which 55.0 kJ of heat transfer…

A: heat transferred to environment = 55 kJ heat transferred to engine = 70kJ

Q: 4)) An engine is found to have 0.73 efficiency. If it does 218 J of work per cycle, what is the heat…

A: Write the expression for the efficiency of the engine. Here, W is the work done and Qin is the heat…

Q: A reversible engine converts one sixth of heat input into work. When the temperature of the sink is…

A:

Q: A steam engine is operated in a cold climate where the exhaust temperature is 0°C. (a) Calculate the…

A: (A)  The theoretical maximum efficiency of the engine is given by the following expression: η=1-TLTH…

Q: A(n) 88-kg sprinter accelerates from rest to a speed of 11.0 m/s in 4.2 s. (a) Calculate the…

A: Mass(m)=88 kg Initial speed=0 m/s Final speed=11 m/s Time taken=4.2 s

Q: If a heat engine extracts 50 million Joules of useful work when 100 million Joules of heat energy is…

A: Input heat energy = 100 million joules Work done = 50 million joules

Q: ASK YOUR TI Suppose a woman does 913 J of work and dissipates 8,254 J of heat in the process. (a)…

A: ∆U=Q-W=8254 J-913 J=7341 J2.39×10-4 kcal1 J=1.75 kcal

Q: 1. (a) What is the best coefficient of performance for a refrigerator that cools an environment at…

A:

Q: A heat engine with an efficiency of 38% takes in 65 kJ of heat. How much waste heat does it expel…

A: Given  Efficiency η=0.38 Heat intake Q1=65kJ

Q: 1. Suppose a woman does 600 J of work and -9400 J of heat transfer occurs into the environment in…

A:

Q: If the engine does 5.0 J of work per cycle, how much heat per cycledoes it absorb from the…

A:

Q: 1. (a) Calculate the net work output of a heat engine following path ABCDA in the figure below.…

A:

Q: The heat machine receives 1200 J a high-tempeva ture of heat from heat source and re lease the heat…

A: Given Heat given recieved by the heat engine = 1200 J Heat released by the heat engine = 804 J We…

Q: A heat pump has a coefficient of performance equal to 4.85 and requires a power of 1.61 kW to…

A:

Q: What is Carnot efficiency of a heat engine operating between the temperatures of238  and 3   Give…

A: Given:Temperature of hot reservoir (T1)=238°C=238+273=511KTemperature of cold reservoir…

Q: (a) What is the best coefficient of performance for a heat pump that has a hot reservoir temperature…

A: (a). Cop = 5.07  (b).  Q = 4.36*106 (c).  0.033

Q: A heat pump removes 2060 J of heat from the outdoors and delivers 3060 J of heat to the inside of a…

A: Given data The heat removed by the pump is QL=2060 J The heat delivered by the house is QH=3060 J…

Q: A system efficiency 69%, must hit 10 kg of water from 20°C to 100°C within 30 minutes. If the…

A: Given: System Efficiency= 69% Temperature Difference, ∆T=100-20=80 Mass of water, m=10kg Specific…

Q: What is Carnot efficiency of a heat engine operating between the temperatures of165  and 2  Give…

A: The given values are,

Q: The heat machine receives 1200 J of heat from high-temperature heat source and re lease the heat of…

A:

Q: A power plant operates with a heat-source reservoir at 350 ‰and a heat-sink reservoir at 30 ‰. It…

A:

Q: (a) What is the efficiency (in percent) of a cyclical heat engine in which 30o.0 kJ of heat transfer…

A: Given: Amount of heat transfer to the environment = 30 KJ Amount of heat transfer to the engine = 50…

Q: How does the ideal efficiency of an automobile relate to the temperature of the engine and the…

A:

Q: 1. Suppose a woman does 600 J of work and -9500 J of heat transfer occurs into the environment in…

A: Workdone, W = 600 JHeat transferred, Q = -9500 J

Q: Consider an engine with efficiency of 25%. How much must the temperature of the hot reservoir…

A:

Q: Consider a heat engine that uses reservoirs at 800.°C and 0.00 °C. Calculate the maximum possible…

A: The expression for the efficiency of the heat engine is given by,  η=1-T2T1×100 -----(1) Here, η is…