Chemical Thermodynamics Question 489

Question: If heat of dissociation of CHCl2COOH is 0.7 kcal/mol, then ΔH for the reaction: CHCl2COOH+KOHCHCl2COOK+H2O

Options:

A) - 13 kcal

B) + 13 kcal

C) - 14.4 kcal

D) - 13.7 kcal

Show Answer

Answer:

Correct Answer: A

Solution:

  • H++OHH2O(l)

ΔH=13.7kcal …(i) CHCl2COOHCHCl2COO+H+

ΔH=0.7,kcal ….(ii) CHCl2COOH+OHCHCl2COO+H2O(l)

ΔH=

Adding Eq. (i) and (ii), ΔH = - 13 kcal.



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