THE HEAT OF MIXING OF SEAWATER 



Donald N. Connors 



Oceanography Branch Head 



Naval Underwater Weapons Research and Engineering Station 



Newport, R. I. 



ABSTRACT 



Experiments pertaining to the mixing of sea water were conducted 

 using a simple copper calorimeter. The heat of mixing is determined 

 from the change in temperature observed for the adiabatic mixing of two 

 isothermal sea waters of different salinities. The temperature 

 dependency of mixing sea waters with salinities of 10.2^» and GQ.'^% 

 was determined between 2° and 25°C. The observed change in temperature, 

 as a function of temperature, can be expressed empirically as a 

 quadratic : 



AT = -0.0736 + 3.11'10"^T -U.72-10"^T^ 



The salinity dependency of the heat of mixing was determined at 2°C 

 using the salinity pairs 6O.O/IO.O, 5^.6/15-0, U9. 6/20,0, a.nd k^.k/Zk.Qi, 

 Within experimental error, a linea,r relationship exists between the 

 partial specific enthalpy of sea salt a,nd the salinity. 



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