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////Varialble Declaration
ms = 1.423 //Mass of Na2SO4, g
mw = 100.34 //Mass of Na2SO4, g
DT = 0.037 //Change in temperature for solution, K
Mw = 18.02 //Molecular wt of Water
Ms = 142.04 //Molecular wt of ms Na2SO4
Ccal = 342.5 //Calorimeter constant, J/K
Cpw = 75.3
//Data
DHfNa = -240.1
DHfSO4 = -909.3
DHfNa2SO4 = -1387.1
//Calculation
DHs = (-Ms/ms)*((mw/Mw)*Cpw*DT+Ccal*DT)
DHsolD = 2*DHfNa + DHfSO4 - DHfNa2SO4
//Results
printf("\n Enthalpy of solution for Na2SO4 %4.2e J/mol",DHs)
printf("\n Enthalpy of solution for Na2SO4 from Data %4.2e J/mol",DHsolD)
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