Thursday 24 May 2018

Thermodynamics

Hello everyone
Today we will dicsuss about thermodynamics

Let see,

Thermodynamics means change in heat one form  to another form ,also we can say that,  it's deals with the different form of energy and establish The quantitative realtionship bteewen them  in physical and chemical processes.

Basically we can say thermo means heat and what is heat? You will say it is form of energy and what is dynamics?  It means different forms. if we combine both then we can say that in any physical and chemical process  energy exist in different form or going  to be change in one from to different form.

Basic concept in thermodynamics

To study the basic of thermodynamics we have dived the universe in to two parts  system and surrounding.

System : system is a part of universe Or  we can say  a portion of universe where we made observation and measure necessary  the  thermodynamics variable.

Surrounding : surrounding is the out side part of system where the observations need not to be made OR  all remaining  part of the universe other than system called surrounding.

Another term we call boundary which is the surface between system and surrounding is called boundary.

Now we are going to see how  many types of system because if there is a  change in energy  there must be a system on the basis of that we classified in to three system
1) Open system: in open system both matter and energy can exchange with its surrounding. Example : cup of hot tea open is an open system
2) closed system : in close system only energy can change but  not matter with its surrounding. Example :hot cup of tea coverd with saucer is a close system.
3) isolated system : in isolated system both cannot change either energy or matter with its surrounding.Example: hot tea in thermos flask is a isolated system. 
All the system is macroscopic system if there is system they must have some properties like temperature, pressure ,volume energy, density and these macroscopic properties divide into two part.
1) Extensive properties : property of a system whose magnitude depends upon the amount of matter present in the system. Example : mass,  volume internal energy and heat capacity.

2) Intensive properties : property of a system whose magnitude is independent of the amount of matter present in the system. Example : temperature, density, surface tension, viscosity, refertive index, boling point,  melting point and specific heat.

No comments:

Post a Comment

Libermann's nitroso reaction

 nitroso reaction While phenol is reacted with NaNO2 and concentrated H2SO4, it provides a deep green or blue colour which changes to red on...