What is substance in thermodynamics ?



In
thermodynamics a working substance is defined as a fluid (liquid or gas) in
which energy can be stored, removed or transferred through.

Example Air
in IC engine, steam in boiler, water in hydraulic turbine.




Pure
substance


A pure
substance needs to be –

1. Homogeneous in composition (i.e. single
chemical species)

2. Homogeneous and invariable in chemical
aggregation (i.e.

Comments

Post a Comment

Popular posts from this blog

Earthing as Per Indian Standard IS 3043:1987

Image
Earthing is very important part in every electrical system below are earthing pits design which are self explanatory:- Earthing with copper plate:- GI earthing system:- Pipe earthing:- Above Pics describe how to design earthing pits in electrical systems as per Indian Standard IS 3043:1987
Read more

Diferent Parts of Sand Mold- Features

Cope and drag in Sand Mold : Cope and Drag are the two parts of the casting flask. Cope is the upper part and drag is the lower part. Even if the casting process is flaskless , the same terms are used for the upper ans lower parts. Generally the flask is made of wood or metal. It contains molding sand. When metal is poured into the mold cavity the flask supports the mold. Gating system:
Read more

Different Types of Plastics- Advantages and Disadvantages

Plastics can be classifies into two broad categories - Thermosets and Thermoplasctics. A brief description of these two classes will be discussed here. Thermosets are the kind of plastics which are not recyclable. They undergo a kind of chemical change at the time of heating. As a result they can be shaped once because of this permanent chemical change. This process is known as heat hardening.
Read more