Closed pressure vessel contains Helium gas (MWHE2= 4) at a pressure of 20 psi (gage) and temperature of 70°F. The air is heated at constant volume to 210°F. The atmospheric pressure is 755 mm Hg. What is the final gage pressure, in psi?

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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.