A freezer is taking heat from inside that is 2°C and dumping heat outside 25°C. Find the coefficient of performance (COP) of the freezer.
a) 12.5
b) 0.08
c) 13.5
d) 12
(Please legibly write out all steps instead of typing them. In addition, please include the formula that you use in order to solve the problem. Thank you.)
A freezer is taking heat from inside that is 2°C and dumping heat outside 25°C. Find...
A heat engine exhausts 8000 J of heat while performing 2000 J of useful work. What is the efficiency of the heat engine? a) 25% b) 33% c) 40% d) 20% (Please legibly write out all steps instead of typing them. In addition, please include the formula that you'll use in order to solve the problem. Thank you.)
How much heat is needed to melt 25.0 kg of aluminum that is initially at melting point 659°C? (Lf= 3.98x10^5 J/kg, T(melting)= 659°C, CM=900 J/kg-°C). a) 3.98x10^5 J b) 22500 J c) 1.48275x10^7 J d) 9.95x10^6 J Please legibly write out all steps instead of typing them. In addition, please include the formula that you'll use in order to solve the problem. Thank you.)
(a) A freezer maintains an interior temperature inside of -22.0°C and has a coefficient of performance of 3.00. The freezer sits a room with a temperature of 25.0°C. The freezer is able to etely canvert 090 J/(9 °C), and the latent heat of & one minute. What input power (in watts) does the freezer require? (The specific heat of liquid water is 4.186 J/(g °C), liquid water at 25.0-tolce specific he ice is of water is 33 J/g.) W (b)...
What is the coefficient of performance of an ideal heat pump that extracts heat from 5.0 ∘C air outside and deposits heat inside a house at 23 ∘C ? (The answer is 16. COP=16.) If this heat pump operates on 1200 W of electrical power, what is the maximum heat it can deliver into the house each hour? (This is what I am having trouble answering. The answer is not to multiply 16 and 1200 to get 19,200 J, nor...
A Carnot refrigerator transfers heat from its inside (5.77 °C) to the room air outside (24.0°C). (a) Find the coefficient of performance of the refrigerator. (b) Determine the magnitude of the minimum work needed to cool 6.62 kg of water from 24.0 to 5.77 °C when it is placed in the refrigerator. (a) Number Units (b) Number Units
The given answer is (d) (i) 15.18 kW (ii)
3.08
However, I don't know how can I solve this question.
Could anyone please help me?
Thank you
d) A freezer maintains a temperature of -18°C inside the cabinet, while the room temperature is at 24°C. If the electrical power consumed by the refrigeration unit is 2.5 kW determine: (i) The maximum possible rate of heat removal from the cabinet at this power input. (ii) The COP of the refrigeration unit...
5, (25 points) A Carnot heat pump is used to maintain a house at 20 °C in winter and consumes 8 kW of power (electricity) when operating. On a day temperature outside the house is -3 °C, the house is estimated to lose heat at an average rate of 80,000 kJ/h. (Sa). (2p) Please identify the hot reservoir and the cool reservoir of this heat pump. (5b). (2p) Please draw of schematic diagram of this heat pump-house heating system with...
4. Refrigeration and air conditioning is quite useful, but it is, in effect, a way to move heat from a low temperature to a high temperature. Is this possible, given the second law? Answer the following questions below, for R-134a (a common refrigerant), and then state whether you believe refrigeration violates the second law, and why (or why not) a. R-134a arrives to the inside of the refrigerator that you are trying to keep cooled to T- 4°C. The air...
(Please legibly write out all steps. Please don't type out the answer. In addition, please include the physics formula that you'll use in order to solve the problem. Thank you. ) How much ice is required to bring the temperature of 0.75 L of soda from 35°C to 0°C? (Lf= 3.33x10^5 J/kg, Cwater= 4186 J/kg, °C, Mass of 1 L of water= 1 kg (95% of soda is water). The answer should be in kilograms. a) 0.25 kg b) 0.33...
Please Solve all the parts. if you cannot. please leave for
someone who can. Also please write everything clearly so I can
read. Thank you.
Task A heat pump delivers 8 kJ thermal energy to the high temperature reservoir (the inside of the house). Consider the following five cases for the power consumed in the heat pump: a) W 8 k] b) W 0 kJ c) W 1 kJ d) W 0.5 kJ e) W 0.87 kJ Using the Clausius...