An object with initial temperature of -25°C is placed in a room kept at 25°C. After half an hour the object's temperature is – 15°C. 2. (a) Find an expression for the object's temperature as function of time. (b) What is the object's temperature after another half hour? (c) When will the object have warmed to 10°C? When will the object have warmed to 25°C?|

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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.