Define hydration energy.(b) Given that: the hydration energies of Ca2+ and Cl- are -1891 kJ mol-1 and -384 kJ mol-1 respectively,and that the...

      

(a) Define hydration energy.(1 mark)
(b) Given that: the hydration energies of Ca2+ and Cl- are -1891 kJ mol-1 and -384 kJ mol-1 respectively,and that the lattice energy of calcium chloride is +2237 kJ mol-1.Calculate the molar enthalpy change of solution of calcium chloride.

  

Answers


Davis
a)Energy change that occurs when one mole of gaseous ions become hydrated//form weak
bonds with water molecules

b)?Hsoln= Lattice energy + Hydration energy
=+2237+(-1891)+2(-384)
= -422 kJ mol-1
Githiari answered the question on September 13, 2017 at 02:15


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