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Macroscopic approach, 1. Attention is focussed on a certain quantity, of matter without taking into account the, events occuring at molecular level., Microscopic approach, 1. Matter constituting the system is, considered to comprise a large number of, discrete particles called molecules. These, molecules have different velocities and, 2. Analysis is concerned with gross or overall, behaviour of the system, and this approach, is adopted in the study of classical, thermodynamics., 3. A few properties are needed to describe, the system., 4. The properties like pressure and, temperature etc needed to describe the, system can be easily measured, and felt, by our senses., energies, and these parameters constantly, change with time., 2. A knowledge of the structure of matter is, essential in analysing the behaviour of the, system, and this approch is adopted in, the study of statistical thermodynamics., 3. Large number of variables are needed to, describe the system., 4. The properties like velocity, momentum, and kinetic energy which describe the, behaviour of the molecules can neither be, felt by our senses nor easily measured by, instruments., 5. The properties of the system are their, average values., 6. The macroscopic approach requires simple, mathematical formulae for analysing the, system., 5. The properties are defined for each, molecule individually., 6. Number of molecules is very large and as, such the microscopic approach requires, advanced statistical and mathematical, methods to explain any change in the, system., Scanned with CamScanner