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Phase Rule in Chemical Equilibrium

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Questions and Answers

What is the primary purpose of a phase diagram?

To show the conditions of pressure and temperature under which the various phases exist (correct)
To identify the critical point of a substance
To calculate the degree of freedom of a system
To determine the number of components in a system

What is the triple point of a substance?

The point where the pressure and temperature are fixed
The point where two phases of a substance become indistinguishable
The point where the solid, liquid, and vapour phases of a pure substance can exist together at equilibrium (correct)
The point where the system has a maximum of two degrees of freedom

What is the critical point of a substance?

The point where two phases of a substance initially become indistinguishable from one another (correct)
The point where the solid, liquid, and vapour phases of a substance can exist together at equilibrium
The point where the pressure and temperature are fixed
The point where the system has a maximum of two degrees of freedom

What is the relationship between the number of components and the degree of freedom in a system?

The degree of freedom is equal to the number of components minus the number of phases plus two (A) Signup and view all the answers

How many variables need to be fixed in a one-component system to define the system completely?

Two (C) Signup and view all the answers

What is the effect of temperature on the number of components in a system?

The number of components depends on the system's behaviour (B) Signup and view all the answers

What does the phase rule govern?

The number of phases that can co-exist in an equilibrium in the system (B) Signup and view all the answers

What is the term for the smallest number of chemical constituents needed to make up all phases in a system?

System components (D) Signup and view all the answers

What is a component in a system according to the phase rule?

The minimum number of chemical species required to define a system and all its phases (A) Signup and view all the answers

What is the primary function of the Gibbs phase rule?

To calculate the variance or degrees of freedom of a system (A) Signup and view all the answers

What is the expression of the phase rule?

F=C-P+2 (C) Signup and view all the answers

What is the degree of freedom in the phase rule?

The number of variables that can be changed independently (B) Signup and view all the answers

What is a characteristic of a closed system?

Only energy exchange with the surroundings (B) Signup and view all the answers

What is the minimum number of components required to define a system consisting of ice and water?

1 (D) Signup and view all the answers

What is the term for a part of the universe that can be isolated to study it?

System (B) Signup and view all the answers

What is the minimum number of variables required to completely define the state of a system at equilibrium?

Degrees of freedom (B) Signup and view all the answers

What is a phase in a system according to the phase rule?

A physically distinct part in a system that is mechanically separable from the rest (D) Signup and view all the answers

What is the term for a chemically and physically homogeneous part of a system that is bounded by an interface with adjacent phases?

Phase (D) Signup and view all the answers

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