Two new metallic elements have been discovered, Cimium (Ci) and Sadowium (Sd). Both the pure elements and their solutions form simple cubic lattices. The bond strengths of the Ci-Ci and Sd-Sd bonds are known, but not the Ci-Sd bond.

Question

Bond Bond Energy (kJ/mole)
Ci-Ci -245
Sd-Sd -191
J-R ??

Mixing a solution of 40% cimium and 60% sadowium is an endothermic process. According to your calorimeter, the solution draws 44.6 kJ/mol of heat when mixed. What is the strength of the Ci-Sd bond? Please give your answer in kJ/mol.

Answer 1

Any ideas??

Answer 2

Anonymous, your solution is wrong. Could you give me a hint of your steps?

Answer 3

whats the answer

Answer 4

Use the equation:
delta(w)= 2w(A-B)-w(A-A)-w(B-B)

delta(w)= 44.6
(A-A)Ci-Ci=-245
(B-B)Sd-Sd=-191

44.6 = 2w(A-B)-(-245)-(-191)
w(A-B) = [44.6 - 245 - 191]/2
w(A-B)= -195.7

-195.7

Answer 5

its -195.7