7. What is the statistical measure of entropy?  A. disorder of a system B. heat of a system  C. order of a system D. cooling of a system 8. The second law of thermodynamics relates to ___________________________.  A. enthalpy B. entropy  C. free energy D. heat  9. Standard entropy is measure at ____________________________.  A. 25oC and 1.o atm B. 25oC and 2.0 atm  C. 100oC and 1 atm D. 25oC and 2.5 atm

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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.