A polytropic process (n = - 1) has initial state with P = 0 KPa, V = 0 m³ and final state with P= 600 kPa. V = 0.01 m³. Find the value of work done during this process. Select one: O a. 3 k) O b. 2 kJ O c. 4 k) O d. 1 k)

Q: A 10 kg mass of superheated R-134a at 1.88 MPa and 70°C is cooled at constant pressure until it…

A: Givensuperheated R-134a m=10kgP1=1.88MPaT1=70oCcooled at constant pressure ie. P2=P1=1.88MPa…

Q: Air fills a 2-m-diameter balloon at 20°C and 5 kPa gage. Additional air is forced into the balloon…

A: Given: Diameter of balloon, D1=2 m Temperature, T=20°C Pressure, P =5 kPa

Q: Steam at saturation pressure of 1.75 MPa has a quality of 78%. Find the following properties: a.) v…

A: Write the given data with suitable variables: P=1.75 MPax=78 %

Q: A 250 kg part falls from an airplane and hits the ground at 150km/h a) find the kinetic energy

A: Mass of part, m=250 kgSpeed of part, V=150 km/h

Q: 4kg of air contained in a piston-cylinder apparatus at 1 bar. 40°c is compressed isothermally untill…

A: Given: Mass of air, m = 4 kg P1 = 1 bar T1 = 40°C or 313 K P2 = 7 bar Required: (a). W ( work done)…

Q: A change of the system temperature, AT, can be: a) positive, b) negative, c) of any sign or zero.

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.