At 3.0 bar pressure and 25.0 degrees Celsius, it is thought to be ideal for a 1.5dm3 hydrogen gas. H2 has a heat capacity of 28.80 J K–1 mol–1, which is temperature independent. It is adiabatically and reversibly extended to a volume of 5.0 dm3. a. After the gas has expanded, calculate the final pressure and temperature. b. For the process, calculate ΔU and ΔH.

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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.