Pertanyaan
7. Use the following data to calculate a value for the enthalpy change of solution of copper (II) chloride, CuCl_(2)(s) Enthalpy change of hydration of CT=-378kJmol^-1 Enthalpy change of hydration or Cu^2+=-2099kJmol^-1 Lattice energy of CuCl_(2)(s)=-2824kJmol^-1 a. -54kJmol^-1 c. 31kJmol^-1 b. -31kJmol^-1 d. 54kJmol^-1
Solusi
Jawaban
b. -31 kJmol^-1
Penjelasan
Untuk menghitung perubahan entalpi pelarutan tembaga(II) klorida, kita perlu mempertimbangkan entalpi perubahan hidrasi dan energi kisi.1. Enthalpi perubahan hidrasi tembaga(II) klorida: