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How much heat will be released if a 98% (m/m) H2SO4 solution is diluted to 96% (m/m)

Question asked by nico groen on Nov 22, 2018
Latest reply on Nov 23, 2018 by Michael Dowell

I know i have to look at the reaction enthalpy. Normally for diluting sulphuric acid the following reactions occurs:

 

(1)     H2SO4 + H2O --> H+ HSO4- +H2O

(2)     HSO4- + H2O --> H+ SO42- +H2O

 

But in the above situation there is a shortage for the watermolecule

Does only the first reaction (1) take place? and therefore only heat is released by the first reaction?

 

Regards,

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