If 200 J of heat is released by a reservoir at 373 K and absorbed by a second reservoir at 273 K, how much work capability is “lost” in this process?     200 J     - 200 J     400 J     0

Q: In a piston-cylinder assembly, 0.2 MPa pressure, 0.5 kg of Refrigerant 134 (SA-134) at 20 °C is…

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Q: AFor a heat engine operating with steam, working medium is expanding from 8 bar, vapor quality 0.86…

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Q: A frictionless piston-cylinder device as shown in Figure Q4 contains 8.5 liters of saturated liquid…

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Q: What is Transformation of Energy and what are its types?

A: Solution:

Q: Using 1st law of thermodynamics, establish a thermodynamics system where adiabatic and non-…

A: An adiabatic process is a process in which there is no heat interaction between the system and the…

Q: stream of water (4 kg/s; T = 50ºC) is continuously mixed with another stream of water (1 kg/s; T =…

A: Given:m1=4 kg/sT1=50°Cm2=1 Kg/sT2=80°CQa=50 KJ/Kg

Q: A piston cylinder device operates 1kg of fluid at 20 atm pressure . The initial volume is 0.04m^3…

A: Draw the P-v diagram of the system.

Q: heat within the wall, the irreversibility (in W) due to heat transfer through the wall is

A: Given data;

Q: Question No 1: An office worker claims that a cup of cold coffee on his table warmed up to 80 C by…

A: In this question an office worker claims that a cup of cold cofee on his table warmed upto the…

Q: In a steam engine cylinder 0.15 kg of steam at 10 bar and 250 0C expands to a pressure of 1 bar. If…

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Q: A 10 kg Iron Box is holding 48 kg of solid ice. Initially, both the box and the ice are at -35 C.…

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Q: A spring of spring con hitially by 5 cm fro

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Q: The figure shows the two process on the P-V diagram. Ifthe (W2-3 = 2.4 W-2) and the work different…

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Q: b) Calculate the work done (W) when heat (Q) supplied to a system is 100 Joules and change in…

A: Answer: The work done (W) by the system is 41 Joules.

Q: A rigid container with volume of 200 L is divided by a partition resulting to two equal volumes A…

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Q: g air with initial temperature of 100°C expands at a constant pressure of 2 bar to reach to a final…

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Q: A water heater supplies (25)kw of power in the form of heat to water. If the (323)kg of water is…

A: The specific heat of water is given as, The heat required to heat the water from -5 oC to 55 oC is…

Q: m = 0.9000 kg of water is heated with P = 481 W electric heater for t = 39 min. During this time the…

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Q: u or h in the general energy

A: In general equation enthalpy h will be used.

Q: imagine a heat machine that operates between two thermal reservoir T10 and Q1>0.

A: Consider a Simple cycle having two reservoir T1 is temperature of Low temperature reservoir T2 is…

Q: Five kilograms of neon in a constant volume system. The neon is initially at 550 kPa and 350 K. Its…

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Q: m = 0.9000 kg of water is heated with P = 481 W electric heater for t = 39 min . During this time…

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Q: In a system undergoing adiabatic expansion, what are the values of internal energy and heat if work…

A: Given data:

Q: Air with a pressure of 2 MPa and a temperature of 250 C (0.5 kg of PV^ 1.25 = expands while…

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Q: In a cylinder, the heat rejected is 32 kJ while the decrease in internal energy of the gas is 92 kJ.…

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Q: A pressure cooker containing some water with an internal energy of 300 kJ is heated by a gas burner.…

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Q: 4-67 A 4-m x 5-m x 6-m room is to be heated by a baseboard resistance heater. It is desired that the…

A: Given data: T1=5°CT2=25°Ct=17 minP=100 kPa Need to determine the power required for the resistance…

Q: Problem: A system undergoes a cycle composed of four processes. The heat transfer in each process is…

A: Given:  Process 1: Q1 = 400 kJ, W1 = 140 kJ Process 2: Q2 = -365 kJ, W2 = 0 Process 3: Q3 = -200 kJ,…

Q: Calculate the work done (W) when heat (Q) supplied to a system is 100 Joules and change in internal…

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Q: One side of a wall is maintained at 400 K and the other at 300 K. The rate of heat transfer through…

A: Given Ts1=400 KTs2=300 KQ.=1000 WTsur=25oC To find Rate of heat transfer within wall

Q: Q2 (a) A heat engine is a system that converts heat into mechanical energy, which can then be used…

A: No, It is not possible for a heat engine to operate without rejecting any waste heat to a low…

Q: A heat engine receives a heat-transfer at the rate of 2 MW at a high temperature of 750 °C. The…

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Q: For irreversible adiabatic expansion or compression of an ideal gas, work is equal to the internal…

A: Adiabatic process-A process, in which no heat transfer takes place.when there is nointernal friction…

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.