Basic Aspects of Thermodynamics

let s talk about internal energy. Internal energy of a substance is the total energy present in the particular quantity of that substance. For a chemical reaction or a physical change of reactants, the change in internal energy (A E) of the reactants is expressed as follows  

A = Final internal energy - Initial internal energy AE= Q + JV 

Q represents the heat and IV represents the work done. 

Based on the above equation, these conventions are followed  

When heat is absorbed by a system, heat (0 is positive. 

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