Q6. A 500 W heater is used to melt 5 kg of solid ice at -30°C to gas at +130°C at a constant pressure of 100 kPa. (a) Show the process on the p-T-v, p-v and T-v diagrams (b) Find the change in the total volume of the water (c) Find the energy the heater must provide to the water (d) Find the time the process will take assuming uniform T in the water

Q: Draw Pv and Ts diagram of reversible isobaric process. Write the relationship between thermodynamic…

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Q: For the following process: Saturated liquid water, initially at 25°C contained inside a tank, is…

A: Three single phase zones (liquid, vapour, and supercritical fluid) are represented on the Tv…

Q: 50 btu of heat are added to a gas at a constant temperature of 600 F. How much of this heat is…

A: Given Data: The heat added at temperature TH  = 600 F is Q = 50 Btu. The refrigerator temperature…

Q: An adiabatic rigid steam tank has expansion valve. Initially, steam is at 1MPa and 350C. Suddenly,…

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Q: 3kg of Co2 expanded in a stationary piston cylinder through a polytropic process from 30 degree…

A: T1= 30+273= 303K, m=3kgP1=250KPa, P2=100KPan=1.45T2T1= 1002501.45-11.45=228.014KTotal Work, W=…

Q: Saturated liquid water, initially at 25°C contained inside a tank, is then delivered by a pump at 5…

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Q: Calculate the workdone, heat transfer and change in entropy.  Do not need to solve.  I just need…

A: Now write the expression for the work done.

Q: R-134a fills a 0.1-m³ capsule at 20°C, 200 kPa. It is placed in a deep freezer, where it is cooled…

A: Soln:- C. v. R- 134a out to the -20°c space. Energy equation :-  m(u2-u1) = 1Q2- 1W2 Actual process…

Q: 4.7 The refrigerant R-22 is contained in a piston/cylinder as shown in Fig. P4.7, where the volume…

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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.