Please help solve part (a) and (b). Thank
you.
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Please help solve part (a) and (b). Thank
you.
A Carnot refrigerator (the reverse of a...
To make ice, a freezer that is a reverse Carnot engine extracts 42 k) as heat...
To make ice, a freezer that is a reverse Carnot engine extracts 42 k) as heat at -13°C during each cycle, with coefficient of performance 6.0. The room temperature is 29.9°C. How much (a) energy per cycle is delivered as heat to the room and (b) work per cycle is required to run the freezer? (a) Number Units (b) Number Units Click if you would like to Show Work for this question: Open Show Work
b. A freezer you got from a student sale has an inside temperature of – 10C;...
b. A freezer you got from a student sale has an inside temperature of – 10C; the temperature in your dorm room is around 20C; assume the freezer is a Carnot engine; furthermore, the insulation is not perfect, and allows for heat to enter the freezer at a rate of 0.1 W. How much power is needed (in the freezer motor) to maintain the constant inside temperature? You are putting 1 liter room-temperature water in ice-cube trays into the freezer...
A) A steam engine (assume a Carnot engine ) has an efficiency of 62.9%. If the...
A) A steam engine (assume a Carnot engine ) has an efficiency of 62.9%. If the waste heat has a temperature of 13.5◦C, what is the temperature of the boiler? Answer in units of ◦C. B) The interior of a refrigerator has a surface area of 2.4 m2. It is insulated by a 3 cm thick material that has a thermal conductivity of 0.0222 J/m · s ·◦ C. The ratio of the heat ex- tracted from the interior to...
.85-120 Thermodynamics Tutorial 3 Problem 1. An inventor claims to have invented 4 engines, each of...
.85-120 Thermodynamics Tutorial 3 Problem 1. An inventor claims to have invented 4 engines, each of which operates between constant-temperature reservoirs of 400 and 300 K. Consider the 1st and 2nd laws of thermodynamics to evaluate the engines. For each engine, state and explain why it does or doesn't violate the 1st and 2nd Laws of Thermo. 1st law hint: Think quantity of work. 2nd Law hint: Think process efficiency. Engine 1 2 3 4 QH (J) 200 500 600...
Please show steps, thank you A4: A refrigerator door has a height and width of H...
Please show steps, thank you
A4: A refrigerator door has a height and width of H = 1 m and W = 0.65 m, respectively, and is situated in a large room for which the air and walls are at T. = Tu = 25°C. The door consists of a layer of polystyrene insulation (k = 0.03 W/m $ K) sandwiched between thin sheets of steel (E = 0.6) and polypropylene. Under normal operating conditions, the inner surface of the...
please help with 5.34 , 5.35 , 5.36 and 5.45 4. Problem 5.34 5.34 For each...
please help with 5.34 , 5.35 , 5.36 and 5.45
4. Problem 5.34 5.34 For each of the cases below, determine if the heat engine satisfies the first law (energy equation) and if it violates the second law. a. Qu = 6kW, 0. = 4kW, W = 2 kW b. Qu = 6kW, = 0kW, W = 6kW c. Qu=6kW, 2. = 2 kW, W = 5kW d. Qu=6kW, L = 6kW, W = 0kW 5.35 For each of the...
Need help with part D You decide to use your body as a Carnot heat engine....
Need help with part D You decide to use your body as a Carnot heat engine. The operating gas is in a tube with one end in your mouth (where the temperature is 37.0 ∘C) and the other end at the surface of your skin, at 30.0 ∘C. PART A What is the maximum efficiency of such a heat engine? ANS: 2.3% PART B Suppose you want to use this human engine to lift a 2.50 kg box from the...
HELP,, PLEASE ANSWER ALL. A Carnot refrigerator removes 10 kW of heat from a thermal reservoir...
HELP,, PLEASE ANSWER ALL.
A Carnot refrigerator removes 10 kW of heat from a thermal reservoir at 3°C, using 4 kW of power. What is the temperature of the high-temperature thermal reservoir? O a. 4.2°C O b.2.14°C O c. 113°C d. 145°C How much power is needed to operate a Carnot heat pump if the pump receives heat at 10°C and delivers 50 kW of heat at 40°C? O a. 37.5 kW O b. 5.30 kW O c. 150 kw...
please answer all of question 9 thank you pdf 9: Liquid water at a pressure of...
please answer all of question
9 thank you
pdf 9: Liquid water at a pressure of 8 MPa and temperature of 60c enters a boiler at a rate of 240 kg/sec. The water leaves as steam at a pressure of 8 MPa and a pressure of 420 C. How many tons of coal per hour are needed for this boiler if the heat exchanger efficiency in the combustion chamber is 92%. Coal has a heat content of 26 million B...
please answer asap. thank you PRACTICE IT Use the worked example above to help you solve...
please answer asap. thank you
PRACTICE IT Use the worked example above to help you solve this problem. A 4.90 kg block of ice at 0°C is added to an insulated container partially filled with 12.0 kq of water at 15.0°C. (a) Find the final temperature, neglecting the heat capacity of the container. -12.39 Your response differs significantly from the correct answer. Rework your solution from the beginning and check each step carefully.°C (b) Find the mass of the ice...
To make ice, a freezer that is a reverse Carnot engine extracts 42 k) as heat at -13°C during each cycle, with coefficient of performance 6.0. The room temperature is 29.9°C. How much (a) energy per cycle is delivered as heat to the room and (b) work per cycle is required to run the freezer? (a) Number Units (b) Number Units Click if you would like to Show Work for this question: Open Show Work
.85-120 Thermodynamics Tutorial 3 Problem 1. An inventor claims to have invented 4 engines, each of which operates between constant-temperature reservoirs of 400 and 300 K. Consider the 1st and 2nd laws of thermodynamics to evaluate the engines. For each engine, state and explain why it does or doesn't violate the 1st and 2nd Laws of Thermo. 1st law hint: Think quantity of work. 2nd Law hint: Think process efficiency. Engine 1 2 3 4 QH (J) 200 500 600...
Please show steps, thank you
A4: A refrigerator door has a height and width of H = 1 m and W = 0.65 m, respectively, and is situated in a large room for which the air and walls are at T. = Tu = 25°C. The door consists of a layer of polystyrene insulation (k = 0.03 W/m $ K) sandwiched between thin sheets of steel (E = 0.6) and polypropylene. Under normal operating conditions, the inner surface of the...
please help with 5.34 , 5.35 , 5.36 and 5.45
4. Problem 5.34 5.34 For each of the cases below, determine if the heat engine satisfies the first law (energy equation) and if it violates the second law. a. Qu = 6kW, 0. = 4kW, W = 2 kW b. Qu = 6kW, = 0kW, W = 6kW c. Qu=6kW, 2. = 2 kW, W = 5kW d. Qu=6kW, L = 6kW, W = 0kW 5.35 For each of the...
HELP,, PLEASE ANSWER ALL.
A Carnot refrigerator removes 10 kW of heat from a thermal reservoir at 3°C, using 4 kW of power. What is the temperature of the high-temperature thermal reservoir? O a. 4.2°C O b.2.14°C O c. 113°C d. 145°C How much power is needed to operate a Carnot heat pump if the pump receives heat at 10°C and delivers 50 kW of heat at 40°C? O a. 37.5 kW O b. 5.30 kW O c. 150 kw...
please answer all of question
9 thank you
pdf 9: Liquid water at a pressure of 8 MPa and temperature of 60c enters a boiler at a rate of 240 kg/sec. The water leaves as steam at a pressure of 8 MPa and a pressure of 420 C. How many tons of coal per hour are needed for this boiler if the heat exchanger efficiency in the combustion chamber is 92%. Coal has a heat content of 26 million B...
please answer asap. thank you
PRACTICE IT Use the worked example above to help you solve this problem. A 4.90 kg block of ice at 0°C is added to an insulated container partially filled with 12.0 kq of water at 15.0°C. (a) Find the final temperature, neglecting the heat capacity of the container. -12.39 Your response differs significantly from the correct answer. Rework your solution from the beginning and check each step carefully.°C (b) Find the mass of the ice...
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