How much heat (in kJ) is released when 1.65 mol NaOH(s) is dissolved in water? The molar heat of solution of NaoH is -445.1 kJ/mol.

1 Answer
anor277
Jun 11, 2017

We are given that............and get #DeltaH_"rxn"=-734.4*kJ#

Explanation:

We are given that......

#NaOH(s) stackrel(H_2O)rarrNa^(+) + HO^(-) + Delta#

Where #Delta=445.1*kJ# per mole of reaction as written........the enthalpy term was NEGATIVE and thus we regard heat as a product.

And this in your proposed reaction:

#Delta_"rxn"=1.65*molxx(-445.1*kJ*mol^-1)=-734.4*kJ#

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