0.5 kg of air in an insulated closed system is heated from 17°C to 427°C at constant pressure with the help of an electric heater. Given that specific heats change with temperature, which of the following is the entropy change of air? A) 0,429 kJ/kgK  B) 0,452 kJ/kgK

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Q: It states that all kind of energy are not of the same quality.________________________

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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.