A liquid R-134a bottle has an internal volume of 0.001 m3 . initially it contains 0.4 kg of R-134a (saturated mix) at 26oC. A valve is opened and R-134a vapor only is allowed to escape slowly such that temperature remains constant until the mass of R-134a remaining is 0.1kg. find heat tranfer necessary with the surroundings to maintain the temperature and pressure of R-134a constant.

Q: nside a piston cylinder. 10g of air is adiabatically compressed. Initially the air is at 27 degree…

A: First Law of thermodynamics: Energy can never be created nor be destroyed but it can be transferred…

Q: Mr Luda wants to understand further about a newly created gas. The gas is initially at a pressure of…

A:

Q: We have refrigerant R-134a at a temperature of 30 C and a specific enthalpy of 127 kJ/kg. Find the…

A: According to the given data A refrigerant R-134a is at T= 30 C h=127 kJ/kg. we need to find The…

Q: Determine the change in Enthalpy, no need to answer question in picture, that's just for the context…

A: Given   Initial enthalpy, h1 = 247.77 kJ/kg    Final enthalpy, h2 = 268.18 kJ/kg Find   Change in…

Q: The cooling system of a car engine contains 20.0 L of water (1L(1L of water has a mass of 1kg1kg ).…

A: Given Data  Heat transfer, Q=836 KJ Specific heat of water, C=4180 J/Kg 1L has 1Kg 20L has 20 Kg…

Q: Thermodynamics problem. Two kilograms of water at 125KPa are completely vaporized. Calculate the…

A: For water m = 2 kg P = 125 kPa x1 = 0, x2 = 1 It is required to determine V1 and V2

Q: 0.75 Ibm of oxygen is initially at 30 psi and 50°F. The oxygen expands in an isobaric process until…

A: Given data: Mass of Oxygen, m=0.75 lbInitial pressure, P1=30 psiInitial temperature, T1=50°FFinal…

Q: Determine the type of steam, given: Temperature: 156°C Internal Energy: 1550 kJ/kg O Wet Vapor

A: For first question Given data, T = Temperature of the steam = 156 oC u = Internal energy = 1550…

Q: A piston-cylinder device initially contains 0.82 m3 of air at 212 kPa and 78.2oC. The air is now…

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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.