Introduction to Thermodynamics

Blind definitions are the first place where misconception starts to grow. And it would be nice to discuss without any of those blind things.

An easy tip to avoid blind definitions is, by imaging yourself at the old time when the discovery was made. Then, believe yourself as the scientist and do the research.

Our first discussion in our society started with Thermodynamics. 

Let us begin our research on that.

What is thermodynamics? What is the purpose of studying it?

To get the feeling of its original creation,

Let us say we are in some 18^th century or before. At that time what would be the need for this study of thermodynamics?

In 18^th century, there are proof for the usage of many machines and pumps using the suction of air and water. 

Moreover even the manual water pumps in our houses are made by the study of air in a column of cylinder.

And also it would have known or easily predicted that the weather is related with the flow of air and determined by the temperature and pressure of the atmosphere, which plays a fundamental importance in agriculture.

Thus, there are many grateful needs for this study.

So, the things to be sure are that this study should have started with the properties of air and water and their behaviour.

So, the major concern of the physicists is now to explain the behavior of these systems (especially fluids, gases).

But now the question may arise,

How can you straightly put these new words called Pressure, temperature, etc.

From analyzing our daily processes each concept is created separately, as follows,

In a heating process the conception of heat and temperature comes into play,

In the construction of a dam, the term pressure comes into play,

and also the term volume comes into play.

Thus the terms like pressure, volume, temperature describing the system should be dealt separately before learning about this weather.

Using mathematics,

The words can be replaced as,

The behavior of any fluid or gas system is the function of Pressure,
Temperature and Volume, Where,

Pressure (especially atmospheric pressure),

Temperature

and volume are independent variables.  

To understand our functional behavior, it is necessary to find a way to measure all its independent variables.  

Hence, We (The scientist) should start to build instruments to measure and analyze these independent variables.