In chemical engineering we study heat transfer and chemical engineering thermodynamics both involve transfer of heat, yet there is difference between study of heat transfer and thermodynamics. In heat transfer, we study the system when heat transfer is taking place. like cooling of hot tea as time proceeds, while in thermodynamics we study the system before and after the heat transferred has taken place i.e. the state of hot tea and state of cold tea. The conclusion can be drawn that in heat transfer we can find the state of the system as a function of time while in thermodynamics we can determine the state of the system after the process has taken place.
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