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Equation
       
    Name

First Law of Thermodynamics

 
    Equation Δ ⁢ U = Δ ⁢ Q + Δ ⁢ W
 
    Definition of terms

ΔU = change in internal energy of the system, ΔQ = heat entering the system,
ΔW = work done on the system

 
    Comments

  The first law of thermodynamics states that the change of the internal energy of a system is the sum of two things: the work done on the system, and the heat entering the system.

  It is a restatement of the conservation of energy.

 
    References

Momentum, Energy and Mass transfer in continua , J C Slattery, McGraw-Hill, 1972

       


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