The thermodynamic principle involved behind the ice skating is to be explained. The validation of the fact that this principle is the active mechanism in ice skating is to be stated. If ice skating is perfomed on other solids, then the validation of the fact that this mechanism is the driving force is to be stated. Concept introduction: The change in Gibbs free energy, enthalpy and entropy is represented by Δ G ° , Δ H ° and Δ S ° respectively. The relation of Δ G ° and Δ S ° is shown as, Δ G ° = Δ H ° − T Δ S ° The change in Gibbs free energy describes the spontaneity of the reaction. The change in enthalpy describes the relative bond strength in the substance, whereas the change in entropy describes the randomness in the system.

Question

A chlorine (CI) atom is adsorbed on a small patch of surface (see sketch at right). This patch is known to contain 64 possible adsorption sites. The Cl atom has enough energy to move from site to site, so it could be on any one of them. Suppose a Br atom also becomes adsorbed onto the surface. Calculate the change in entropy. One way a Cl atom might be adsorbed on a surface with 16 sites. Round your answer to 2 significant digits, and be sure it has the correct unit symbol.

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Question

Chapter 6, Problem 6.19E

Interpretation Introduction

Interpretation:

The thermodynamic principle involved behind the ice skating is to be explained. The validation of the fact that this principle is the active mechanism in ice skating is to be stated. If ice skating is perfomed on other solids, then the validation of the fact that this mechanism is the driving force is to be stated.

Concept introduction:

The change in Gibbs free energy, enthalpy and entropy is represented by ΔG°, ΔH° and ΔS° respectively. The relation of ΔG° and ΔS° is shown as,

ΔG°=ΔH°−TΔS°

The change in Gibbs free energy describes the spontaneity of the reaction. The change in enthalpy describes the relative bond strength in the substance, whereas the change in entropy describes the randomness in the system.

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