A family uses 300 L of hot water per day. The water is heated from a line temperature of 12° C to 60° C . Calculate the amount of natural gas (Oklahoma) that is required to heat the water in a heater with an efficiencyof 80%.

Q: Q6. A shell-and-tube heat exchanger having one shell pass and four tube passes is used to heat 10…

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Q: A 'long' steel shaft of 10 cm diameter is austenised at 870°C and then quenched in a liquid at 30°C.…

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Q: Q1) a hot gas at 325°C flows through a metal pipe of 10 cm OD and 3 mm thick. It is insulated with a…

A: Given Data  To Find The insulation thicknessHeat loss per m length of the pipe

Q: If you want to boil water at 75 ° C instead of 100 ° C, which of the following do you need to do? A)…

A: Boiling is a phenomenon where the liquid is converted to a vapor form. The temperature required to…

Q: Ice cubes are made by taking heat away from water. Suppose you put 2.50 kg of 40 degrees C water in…

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Q: Air at dry ball temperature 90 ° C and RH 8% is passed over the cooling coil so that the air dry…

A: Given that, Initial dry bulb temperature T1 = 90oC Initial Relative humidity RH = 8% Dry bulb…

Q: 0.3 kg of gas is cooled from 1200C to 50°C at constant volume in a closed system. Calculate the heat…

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Q: 1. A 7-meter-long steel pipe was installed by a man during a cold whether at 20°C. What would be the…

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Q: A rectangular steel (k = 58.7 W/mK) fin 25 mm thick and 150 mm long is attached to a wall that is at…

A: Given: Thermal conductivity of steel, k = 58.7 W/m.K Thickness of fin, w = 25 mm ⇒0.025 m Length of…

Q: Estimate the heat exchanger area needed to cool 55,000 lb/hr of a light oil (specific heat = 0.74…

A: Flow rate of light oil = 55000 lb/hr Specific heat of oil = 0.74 Btu/lb°F Initial temperature of oil…

Q: When 120 kJ work is done on a closed system during a process, the total energy of the system…

A: Given that, the system is a closed system, where work is done on the system. Hence, work will be…

Q: A long cylindrical steel rod is heat treated in an oven that is 7 meters long and is maintained at a…

A: Given data: Length of the cylindrical steel rodd = 7 m Diameter of the rod = 10 cm Initial…

Q: Steady flow of 10kg and temperature of 200°C. If the heat dissipation from the alloy is 715.5kJ.…

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Q: Q2/ The specific heat capacity of copper metal is 0.38 J /K.g. Calculate the temperature rise of a…

A: Given: m= 100g  Cp = 0.38J/g.K Q = 250J

Q: Example 6.2. Figure 6.7 shows a simplified flow diagram of a typical capillary viscometer (a device…

A: To find the viscosity of the fluid, we can use the Hagen-Poiseuille equation, which relates the flow…

Q: A Cuwire with a diameter of 2 mmand a length of 1 mis initially at room temperature (300 K). A…

A: Given data: Diameter of copper wire = 2 mm Length of wire = 1 m Initial temperature = 300 K Voltage…

Q: a roblem 1. A fermentation broth with viscosity 10-2 Pa.s and density 1000 kg/m³ is agitated in a 50…

A: Given that, The viscosity of fermentation broth μ = 10-2 Pa.s The density of fermentation broth ρ =…

Q: How much heat in kJ must be transferred to 10 kg of air to increase the temperature from 100C to…

A: From first law of thermodynamics, dU=dq-dw, Now dw=PdV, dU+PdV+VdP=dQ, As dP =0,

Q: A thick wall made of refractory bricks (k = 1.0 W/m·K and α = 5.08 × 10-7 m2 /s) has a uniform…

A: Thermal conductivity of brick = 1 W/m.K Thermal diffusivity, α = 5.08*10–7 m2/s Initial temperature…

Q: The starting temperature is equal to the room condition. A living organism with a volume of 22.4 L…

A: Given, Volume of living organism is 22.4 L. Number of organisms is 100.   Calculate the total volume…

Q: After transfer of 1.40 kJ of thermal energy to a 0.546-kg block of copper the temperature is 45.2…

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A: For calculating the area we need heat duty.Heat duty is calculated from mass flow rate * heat of…

Q: An automobile engine provides 596 Joules of work to push the pistons and generates 2246 Joules of…

A: Given that, Work done on the system W = 596 J Heat generated by the system Q = 2246 J It is required…

Q: A double pipe heat exchanger is used to cool a 15000 lb/hr air from 175°F to 75°F. Air enters on the…

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Q: 7) What is the coefficient of performance of an ideal heat pump that has heat transfer from a cold…

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Q: 5 kg liquid water is heated on a stove from 30 to 90C, how much work is required if specific heat is…

A: The energy can neither be created nor destroyed. Energy in the universe is constant. One form of…

Q: Q.2/A/ The electric heater consumes 1.5 MJ when connected to a supply of 225 V for 25 minutes. Find…

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Q: A refrigeration system is used to cool water in the evaporator a 6 kg/s of water from 22 ° C to 3°…

A: 1 TR=3.517 kW1 TR=3024 kcal1 kcal=4184 J1 Ton=3024×4184=12652416 J=12652.416 kJ

Q: A large plate of aluminum alloy 2024-t6 5.0 cm thick at a temperature of 250°C is exposed to a…

A: The characteristic length is obtained from the ratio of volume and area. The length is obtained in…

Q: 15.0 g sample of aluminum, whose temperature is 4.0 °C, experiences an energy change of 189 J. The…

A: This question is based on the concept of Heat transfer. Data given: Substance used  = Aluminum Mass…

Q: Round everything to 4 decimal places. A boiler provides 216 GJ of heat per hour to a steam engine…

A: Given Boiler provides of heat=216 GJ/ hour Steam engine providing work = 32.4 GJ/hr Find a)…

Q: For a building located in Minnesota with annual heating degree-days of 8382and a heating load (heat…

A: Heating load (heat loss) = 62,000 kJ/h Temperature difference = 45° C  Indoor Temperature = 20° C…

Q: 6-49 A heat pump is used to maintain a house at a constant temperature of 230C. The house is losing…

A: Given that: Heat lost by house, QL = 85000 kJ/h Heat gained by appliances and lights, QApp = 4000…

Q: It is desired to raise the temperature of a given gas in a container as much as possible with the…

A: A thermodynamic system is a body of matter and/or radiation, confined in space by walls, with…

Q: From the figure below, determine the total rate of heat transfer, q, in BTU per hour. The values of…

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Q: The milk flows through the heat exchanger at a rate of 1800 kg / hr. The heat exchanger is capable…

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