User:Sonawale aditya/sandbox

SOME BASIC TERMS RELATED TO THERMODYNAMICS 1 WORKING SUBSTANCE We know that, heat can be converted into work and work can be converted into heat in mutual manner. so for the purpose of heat transfer there is some mass needed and it should have some specific characteristics for its use or application.The working media used in a system (thermodynamic) is called as working substance. However the medium which is preferred is a fluid most of the times due to its unique characteristics and properties it exists with. for example- 1. the fuel used in an internal combustion engine 2. the steam used for power generation in steam turbine or boiler,etc

2 PURE SUBSTANCE When a substance undergoes change in phase, some substances lose their homogeneity and/or chemical composition, but some substances do not lose their homogeneity and their composition or it is very difficult to make them lose their homogeneity and/or chemical composition. Those substances are termed as pure substance. However the substance may have changes with its physical appearance. Water is the best common example because it exists in three phases- solid (ice), liquid(water) and steam(gaseous). It is difficult to separate hydrogen and oxygen from it.

3 SYSTEM (THERMODYNAMIC SYSTEM) A volume or space of a specific region in the universe which is enclosed with boundaries (imaginary or real) where the specific objective is to analyse and study the various processes of thermodynamics or study related to it.