Question

In a crystal, at 827∘C, one out of 1010 lattice site is found to be vacant, while in the same solid, one out of 2×109 lattice site is found to be vacant at 927∘C. What is the enthalpy of vacancy formation in kJ/mol unit?
A
76.8
B
176.8
C
33
D
23

Answer 1

Answer:

option b is correct. .............

Answer 2

Answer:

option b is ct.............