Macroscopic and microscopic approaches - thermodynamics, Computer Engineering

Assignment Help:

Macroscopic and Microscopic approaches - Thermodynamics:

Thermodynamic studies are undertaken by following two different approaches.
 l. Macroscopic approach (Macro mean big)

2. Microscopic approach (Micro means small)

The state or condition of system can be described completely by measured values of pressure, temperature and volume that are called macroscopic or time averaged variables. In classical

thermodynamics, macroscopic approach is considered. The results obtained are of adequate accuracy and validity.

Statistical thermodynamics uses microscopic approach. It is based on the kinetic theory. The matter consists of large number of molecules that move randomly in chaotic fashion. At particular moment, each molecule has a specific position, velocity and energy. The characteristics change very frequently because of collision between molecules. The overall behavior of matter is predicted by statistically averaging the behavior of individual molecules.

Microscopic view helps to gain better understanding of the laws of thermodynamics. But, it is rather complex, cumbersome and time consuming. Engineering thermodynamic study is macroscopic and most of analysis is made by it.

These approaches are discussed below:

Macroscopic approach

Microscopic approach

1.  In this approach certain quantity of matter is considered without taking into account the events taking place at molecular level. Or we can say that this approach to thermodynamics is concerned with gross or overall behavior. This is called as classical thermodynamics.

 

2. The analysis of macroscopic system requires easy mathematical formulae.

 

 

3.  The values of properties of system are their average values. For instance, consider a sample of gas in a closed container. The pressure of gas is the average value of pressure exerted by millions of individual molecules. Likewise the temperature of this gas is the average value of transnational kinetic energies of millions of individual molecules. These properties such as pressure and temperature can be measured easily. The changes in properties can be felt by us.

4.  In order to describe system only a few properties are required.

1.  The approach considers that system is made up of a very large number of discrete particles called as molecules. These molecules are having different velocities and energies. The values of these energies are changing constantly with time. This approach to thermodynamics that is concerned directly with structure of matter is called as statistical thermodynamics.

2.  The behavior of system is can be determined by using statistical methods, as number of molecules is very large. So superior statistical and mathematical methods are required to explain the changes in the system.

3.  The properties such as velocity, impulse, kinetic energy, momentum, and instruments cannot be easily measure force of impact etc. which describe the molecule. We cannot feel them.

 

 

 

4.  Large numbers of variables are required to describe a system. Thus the approach is complicated.

 


Related Discussions:- Macroscopic and microscopic approaches - thermodynamics

One of the fault base testing techniques, One of the fault base testing tec...

One of the fault base testing techniques is:- Mutation testing is the fault base testing.

Poor human support - obstacle to information system, Poor human support - O...

Poor human support - Obstacle to Information System The full utility of an IS will only be realised if it is properly supported by the users. Technology is never a solution in

What is external interrupt, External Interrupt: Interrupt signal came ...

External Interrupt: Interrupt signal came from input-output devices connected external to processor. These interrupts depend on external conditions that are independent of the

What is skew, What is skew? Clock Skew: In circuit design, clock ske...

What is skew? Clock Skew: In circuit design, clock skew is a phenomenon within synchronous circuits wherein the clock signal (sent through the clock circuit) arrives at dive

What is shadow ram, Shadow RAM is a copy of Basic Input/Output Operating Sy...

Shadow RAM is a copy of Basic Input/Output Operating System (BIOS) routines from read-only memory (ROM) into a particular area of random access memory (RAM) so that they can be acc

Design-centered virtual manufacturing, Design-Centered Virtual Manufacturin...

Design-Centered Virtual Manufacturing This gives manufacturing information to the designer throughout the design phase. In this observing the short term and long time definitio

Central processing unit - computer architecture, Central processing unit (C...

Central processing unit (CPU) : The part of the computer which executes program instructions is known as the processor or central processing unit (CPU). CPU is over single ele

Associative array processing, Consider that a list of record or a table is ...

Consider that a list of record or a table is stored in the memory and you wish to find some information in that particular list. E.g. the list comprises three fields as displayed b

Moral and ethical implications, • Moral and Ethical Implications o Will ...

• Moral and Ethical Implications o Will this be safe to have on the road    Will the computers on board be able to handle extreme circumstances • Hazardous conditions o Ex

What technology used by magento, Magento uses PHP as a web server scripting...

Magento uses PHP as a web server scripting language and the MySQL Database. The data model is based on the Entity-attribute-value model that stores data objects in tree structures,

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd