Touch here to read

Applied Chemistry by Dr. Kedar Mohapatra

Dr. Kedar Mohapatra
Dr. Kedar Mohapatra

/ 21

Note for Applied Chemistry - CHEM By Dr. Kedar Mohapatra

Notes for Applied Chemistry

by Dr. Kedar Mohapatra

  • Downloads: 349
  • Views: 3642
  • Uploaded 3 months ago
Add to Favourite

Suggested Materials

Leave your Comments


Dr. Kedar Mohapatra

Professor, Gandhi Institute for Technological Advancement(GITA)

Text from page-1

Phase Rule BY Dr.KEDAR MOHAPATRA GITA ,BBSR INTRODUCTION 1. It is a statement given by J. Willard Gibbs which explains the behaviour of a heterogeneous system at equilibrium under the changes in the variables such as temperature, pressure and concentration. 2. It is only applicable to macroscopic(large) systems. 3. It can be applied to both physical and chemical equilibrium systems. 4. It predicts the appearance and disappearance of various substances present in the equilibrium under different sets of variable. Before discussing the phase rule and its applications to various equilibria, it is desirable to define and explain the various terms contained in it. Explanation of different terms: SYSTEM It is a part of the universe which on under thermodynamic study. Types of system It is of two types : (1) Homogeneous system (2) Heterogeneous system Homogeneous system: The systems in which the physical and chemical properties are same throughout are called Homogeneous systems. Example-all pure substances, salt solutions, acid solutions, etc. Heterogeneous system: The systems in which the physical and chemical properties are not same throughout are called heterogeneous systems. Example-oil in water,benzene in water,decomposition of CaCO3 solid,etc. Phase of a System It is any homogeneous and physically distinct segment of a system which remains bounded by a surface and is mechanically separable from other part of the system. It is represented by ‘P’ 1. Pure Substance: It forms a single phase.i.e P=1 2. Mixture of gases: It forms a single phase. i.e P=1 3. Miscible liquids: It forms a single phase. i.e P=1