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This question is incomplete, the complete question is;
An oxygen (O₂) molecule is adsorbed on a patch of surface (see sketch at right). This patch is known to contain 324 adsorption sites.
The (O₂) molecule has enough energy to move from site to site, so it could be on any one of them.
Suppose part of the surface becomes inaccessible, so that only 400 adsorption sites are now available for the molecule.
Calculate the change in entropy.
Round your answer to 3 significant digits, and be sure it has the correct unit symbol.
Answer:
the change in entropy is 2.91 x 10⁻²³ J/K
Explanation:
Given the data in the question;
For an ideal gas,
Entropy of a molecule, S = K ln(W)
where K is Boltzmann constant (1.38065 x 10⁻²³ J/K)
W is Equivalent micro states of the molecule
( W = 324 and W
= 400 )
S - S
= K
ln(W
) - K
ln(W
)
ΔS = K ln(W
/ W
)
we substitute
ΔS = (1.38065 x 10⁻²³ J/K) × ln( 400 / 324 )
ΔS = 2.9093 x 10⁻²³ J/K
ΔS = 2.91 x 10⁻²³ J/K
Therefore, the change in entropy is 2.91 x 10⁻²³ J/K
