5) A mass of 15 kg of air in a piston-cylinder device is heated from 25 to 85°C by passing current through a resistance heater inside the cylinder. The pressure inside the cylinder is held constant at 200 kPa during the process, and a heat loss of 70 kJ occurs. Determine the electric energy supplied, in kWh. (Hint: use the ideal gas model) W₂ Air P= constant

Q: A piston-cylinder assembly contains 5 kg of air modeled as an ideal gas with a constant specific…

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Q: Which statement is not correct?   a. For a closed system, the area below the curve of a process on a…

A: Its answer is d) In most cases, internal energy of a closed system is negligible compared to its…

Q: Given the temperature and pressure of an ideal gas, how would you find the specific volume and…

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Q: Two lbs of water vapor in a piston-cylinder assembly expands at a constant pressure of 200 lb/in²…

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Q: Consider the PV diagram as shown above when a thermodynamic system changes its state from state a to…

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Q: A gas is contained in a vertical piston-cylinder assembly by a piston with a face area of 50 in² and…

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Q: Calculate the change in internal energy (in kJ) when a 5 kg Cast Iron pot is heated from 20°C (65°F)…

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Q: Calculate the amount of work necessary for the reversible compression of steam from 1 bar to 10 bar.…

A: Initial pressure of steam, Final pressure of steam, Compression is reversible and isothermal…

Q: 2 kg of water vapor in a piston-cylinder assembly expands at a constant pressure of 300 kPa (3.0…

A: The mass of water vapor is .The pressure is .The final volume is .

Q: An air conditioner is used to remove 8000 Btu/hr of heat from a house in the summer time. The inside…

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Q: Two lbs of water vapor in a piston-cylinder assembly expands at a constant pressure of 250 lb/in²…

A:

Q: spring whose spring constant is 290 lbf/in has an initial force of 100 lbf acting on it. Determine…

A: Spring constant(k)= 290 lbf/inInitial force Fi = 100 lbfWork (W)=?( BTU)Compress Xo = 1 in

Q: Describe an imaginary process that violates both the first and the second laws of thermodynamics.

A: First last of thermodynamics, just discusses the changes that a system is undergoing. The…

Q: A canister of sevoflurane, an inhaled anesthetic, is warmed to room temperature over the course of…

A: Given that, Force exerted by the piston, F= 623mN Volume increase,  dV = 16cm3 We have to find work…

Q: A 4-kW resistance heater in a water heater runs for 2 hours to raise the w temperature to the…

A: Given Data : Power of heater(P)=4 KW Time(t)=2 hours

Q: 2,3) In a plunger cylinder device, 15 kg of air is heated from 25°C to 77°C by passing curr through…

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Q: When an ideal gas undergoes isothermal compression as a closed system, its specific internal energy…

A: Ideal gas is a gas which obeys ideal gas equation PV=mRT. Isothermal compression process is a…

Work and Heat Transfer

It is generally related to thermal engineering which tells about the use, creation, conversion and transfer of heat energy between the systems. It is also considered that to transfer heat from one source to another, transfer of masses is also required. There are various mechanisms by which, transfer of heat takes place i.e. thermal conduction, convection, radiation or by change of phase. All these mechanisms have their own specific features which sometimes occur simultaneously within the same system.