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Comparing the enthalpies obtained for each reaction, how are the three chemical reactions related to each other?

Also, does the data confirm this relationship?

5. Hess Law. Balanced Chemical Equation Enthalpy in kJ/mole Reaction #1 NaOH(s) --------> NaOH(aq) - 40.49 kJ/mol Reaction #

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Answer #1

Answer :

Relationship between the reaction :

Reaction (1) + Reaction (3) = Reaction (2)

If we add 1 and 3rd reaction , we will get reaction (2) .

But when same relationship is applied on enthalpy data , so numerical data wouldn't confirm this relationship . There is a small discrepancy of approx 6KJ/mol is observed.

Reason may be : Temperature fluctuations , instrument error , error in recording the data , calibration error .

Reaution s NaoH Cap) NaoHCs) AH ) - ५०.५१ ।९ऽ|M७ Reaction Q NaoH Co HNO2 (a NaNo3 (a) 20l AH (2) -103. 607 KJmof Reachon 3 HN

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