Question

1. Partial molar volume and partial molar Gibbs energy do share something in common (because both are partial molar quantities).

1. Are both terms constant with respect to composition? Why or why not?
2. When you use these partial molar quantities, can temperature change? Explain.
3. In a binary system, the chemical potential of one component is increased; what about the chemical potential of the other component? Up or down? Why? (hint: you should use an equation to rationalize your answer).

Answer 1

Given that,

a) Yes, partial molar volume and partial molar Gibbs free energy relate with each other by the formula

also

Where, Vi represents partial molar volume of the component i.

i represents partial molar Gibbs free energy.

b) both terms are extensive, for small change in the number of moles of the component, the change in the property in partial molar properties.

c)For a system having only two components, the Gibbs Duhem equation is

Shows that variation in chemical potential of one component affects the value of other component as well. If one component chemical potential increase other also increase and if one component decrease others also down.