Question

An oxygen 02 moleculo is adsorbed onto a small patch of the surface of a catalyst. It's known that the molecule is adsorbed on 1 of 225 possible sites for adsorption Suppose the surface has been modifed so that only 110 adsorption sites are available. Calculate the change in entropy (JIK) that occurs as a result of the modification (Please enter your answer is solontific notation. For example if you answer was-3.15 x 10 please enter-2.15E-6) Answer should be in 3 significant figures and no units are required.

Answer 1

The Baltimann formula for the entopy is - s = kx ln (W) ; where kis Boltzmann's constant (1.381x10-23 +1K) and w is the number of energetically microstates or configurations of the system. In this case -23 s= (1.381 x 10 JlK) x ln (225) equivalent possible W = 225, so -23 1.381 X lo JK X 5.416 S 7.48 x 16 This can be wɛitten as - S = 7.486-23