The drinking water needs of a production facility with 20 employees is to be met by a bubbler-type water fountain. The refrigerated water fountain is to cool water from 22 to 8°C and supply cold water at a rate of 0.4 L per hour per person. Heat is transferred to the reservoir from the surroundings at 25°C at a rate of 45 W. If the COP of the refrigeration system is 2.9, determine the size of the compressor, in W, that will be suitable for the refrigeration system of this water cooler.

Q: A jogger applies an ice pack to their injured leg that contains 0.608 L of water at 4 °C. How many…

A: Volume of water = V = 0.608 L = 608 ml Initial temperature of water = Ti=4° C Final temperature of…

Q: During a bout with the flu an 80 kg man ran a fever of 39.0°C (102.2°F) instead of the normal body…

A: Mass of terminator machine m =80 kg

Q: In exercising, a weight lifter loses 0.197 kg of water through evaporation, the heat required to…

A:

Q: An aluminum washer has an outer radius ro=1.3cm and an inner radius of ri=0.43cm. The temperature of…

A: Given ,         initial temperature Ti=282k         Final temperature Tf=630k        mass of…

Q: A freezer is to convert 1.87 kg of water at 27.6°C to 1.87 kg of ice at -3.4°C. If the coefficient…

A: Heat transfer.

Q: A system gains 2500 J of heat at a constant pressure of 1.26 x 10° Pa, and its internal energy…

A: Given: ∆Q=2500 J P = 1.26*105 Pa ∆ U =3870 J

Q: A counter-flow double-pipe heat exchanger is to heat water from 20°C to 80°C at a rate of 1.2 kg/s.…

A: The rate of heat transfer in the heat exchanger is determined as,

Q: Jill takes in 0.0270 mol of air in a single breath. The air is taken in at 20.0°C and exhaled at…

A: Given, Jill takes in 0.0270 mol of air in a single breath. The air is taken in at 20.0°C and exhaled…

Q: Most automobiles have a coolant reservoir to catch radiator fluid that may overflow when the engine…

A:

Q: A solid cylindrical bar conducts heat at a rate of 133 w from a hot to a cold reservoir under…

A:

Q: The equation of an ideal gas is given by, T = T,e" , where v is the volume of the gas and a is…

A: First law of thermodynamics states that the energy can neither be created nor destroyed but can be…

Q: A block of 10.0 kg of solid gold at its melting point of 1,063.00°C changes phase to liquid gold at…

A: Given data: The mass of block is m=10 kg. The melting temperature is T=1063℃. The latent heat of…

Q: A two-shell passes and four-tube passes heat exchanger is used for heating a hydrocarbon stream (cp…

A:

Q: In a one-shell and two-tube heat exchanger, cold water with inlet temperature of 20°C is heated by…

A: Consider that the heat exchanger is completely insulated.   The temperature variation occurs in 1-D…

Q: The average thermal conductivity of the walls (including windows) and roof of a house in Figure…

A: The height of the triangular section of the support that holds the roof is:

Q: A “solar cooker” consists of a curved reflecting mirror that focuses sunlight onto the object to be…

A: Formula to calculate the mass of the water is,

Q: Initially you have mwater=4.2kg of water at Twater=66 degrees celcius in a insulated container. You…

A: Recall Q=mc∆T Also, principle of calorimetry. Heat lost by hotter body=heat gained by colder body

Q: A freezer is to convert 1.73 kg of water at 28.7°C to 1.73 kg of ice at -4.43°C. If the coefficient…

A:

Q: To illustrate the effect of ice on the aluminum cooling plate, consider the drawing shown here and…

A:

Q: How much fiberglass insulation (k = 0.035 W/m*K) is needed to guarantee that the outside temperature…

A: Given: The conductivity is k=0.035 Wm·K. The outside temperature of kitchen is t0=43°C. The maximum…

Q: A home owner has a leaky bathroom faucet. If her faucet leaks 0.5 L/min and her water is heated to…

A:

Q: A freezer is to convert 1.75 kg of water at 27.5°C to 1.75 kg of ice at -4.63°C. If the coefficient…

A:

Q: Most automobiles have a coolant reservoir to catch radiator fluid that may overflow when the engine…

A: Given:- A radiator is made of copper and is filled to its 15.8 L capacity when at 16.5oC  The fuild…

Q: Air (cp = 1.005 kJ/kg·°C) is to be preheated by hot exhaust gases in a cross-flow heat exchanger…

A: a) The rate of heat transfer is ,

Q: When 25.6J was added as heat to a particular ideal gas, the volume of the gas changed from 45.4cm 2…

A: Given Q= 25.6 J V1 =45.4 cm3  V2 = 97.7 cm3

Q: A test is conducted to determine the overall heat transfer coefficient in anautomotive radiator that…

A: Given data:   The number of tubes in the radiator is n = 40 tubes. The internal diameter of the…

Q: A block of 10.0 kg of solid gold at its melting point of 1,063.00°C changes phase to liquid gold at…

A: SOlution: Given that m = 10 kg L =  6.44×104 J/kg

Q: One gram of water (1 cm3) becomes 875 cm3 of steam when boiled at a constant pressure of 1 atm…

A:

Q: Engine valves (cp = 440 J/kg·K and r = 7840 kg/m3) are to be heated from 40°C to 800°C in 5 min in…

A:

Q: The enthalpy of evaporation of water is 40.67 kJ>mol. Sunlight striking Earth’s surface supplies…

A: The given values with suitable variables are listed below. Here, hv denotes the enthalpy of…

Q: Most automobiles have a coolant reservoir to catch radiator fluid that may overflow when the engine…

A:

Q: A freezer is to convert 1.76 kg of water at 29.6°C to 1.76 kg of ice at -4.27°C. If the coefficient…

A: Given m=1.76 kg Cwater=4190 j/(kg. K) Cice=2100 j/(kg k) L=3.34 x 105j /kg

Q: When 1.0 kg of ethanol at 25°C changes from the liquid to the gas phase at atmospheric pressure. The…

A: mass of ethanol = 1000 g latent heat of vaporization, L=838 J/g

Q: A 5-mm-thick stainless steel strip (k = 21 W/m·K, r = 8000 kg/m3, and cp = 570 J/kg·K) is being heat…

A: Given Data:   The thickness of the plate is, L=5 mm=0.005 m The thermal conductivity is, k=21 W/m-K…

Q: One gram of water (1 cm3) becomes 875 cm3 of steam when boiled at a constant pressure of 1 atm…

A: Given data: Mass, m=1 g Latent heat of vaporization, Lv=2.256×106 J/kg=2256 J/g Volume of steam,…

Q: An air conditioner with refrigerant-134a as the working fluid is used to keep a room at 23°C by…

A: The given values are,   From the properties of R-134a at the inlet and outlet of the compressor,

Q: A total of 105 J of work is done on a gaseous refrigerant as it undergoes expansion. If the internal…

A:

Q: 4. In a steady flow apparatus, 135 kJ of work is done by each kg of fluid. The specific volume of…

A: Given: Work done is 135 kJ The specific volumes are: V1=0.37 m3/kg, V2=0.62 m3/kg The pressure at…

Q: In a espresso coffee shop stand they prepare steamed milk by bubbling steam at 140 degrees Celsius…

A: Temperature of steam = 140oC Initial temperature of milk = 30oC Final temperature of milk and…

Q: A car engine burns 10 Ibm of fuel (equivalent to addition of Q+) at 2600 R and rejects energy to the…

A:

Q: Cold water (cp = 4180 J/kg·K) leading to a shower enters a thin-walled double-pipe counter-flow heat…

A:

Q: A flow calorimeter is an apparatus used to measure the specific heat of a liquid. The technique of…

A: The temperature difference of the liquid is, ∆T=3.50°C The volumetric flow of liquid is, Vt=2.00…