Chemical Thermodynamics Question 350
Question: For which one of the processes represented by the following equations the enthalpy (heat) change is likely to be negative
Options:
A) $ C{{l}^{-}}(g)+aq\to C{{l}^{-}}(aq) $
B) $ Cl(g)\to C{{l}^{+}}(g)+{{e}^{-}} $
C) $ 1/2Cl_2(g)\to Cl(g) $
D) $ Cl_2(l)\to Cl_2(g) $
Show Answer
Answer:
Correct Answer: A
Solution:
- Gaseous ions, when dissolved in water, get hydrated and heat is evolved (heat of hydration). $ C{{l}^{-}}( g )+aq\to {{C}^{-}}( aq ) $ is such reaction .
