Chemical Thermodynamics Question 244
Question: Which of the following salts should cause maximum cooling when 1 mole of it is dissolved in the same volume of water-
Options:
A) $ NaCl;\Delta {{H}^{{}^\circ }}=5.35kJmo{{l}^{-1}} $
B) $ KNO_3;\Delta {{H}^{{}^\circ }}=53.5kJmo{{l}^{-1}} $
C) $ KOH;\Delta {{H}^{{}^\circ }}=-56.0kJmo{{l}^{-1}} $
D) $ HBr;\Delta {{H}^{{}^\circ }}=-83.3kJmo{{l}^{-1}} $
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Answer:
Correct Answer: B
Solution:
- Dissolution of $ KNO_3 $ is endothermic, hence heat is absorbed and cooling is observed.
BETA
