Thermodynamic system – first variable “Volume”

When we do any experiment, we focus our attention to a specific part or a system with boundaries.

Now in our purpose of learning thermodynamics, we mostly take the system of some air or water with certain boundaries.

For our convenience we made a word for that specific system with its boundaries and that is so called Thermodynamic System.

The first independent variable in a Thermodynamic system to notice by a common man is Volume.

Volume is the measure of amount of space occupied by the boundary of the system, and for gases and liquids the volume of the container is considered to be the volume of the system.

Besides, its measurement is very simple and done using our everyday measurements such as length, breadth and width. This is the reason why most of our thermodynamics study involves none other than other shapes but cylinder, being one of the simplest shapes.  

Since length, breadth and height are measured in unit lengths, the volume will be measured in cube of the power to that unit length. 

Unit length is yours to choose. In general for most of the purpose, meter is used as the unit length.

All the information about the volume of the system is thus possible to obtain just using our standard measurement scales. As a result, now it is quantitatively analyzed.  

Note that,

We never cared about the internal structure of the particles or the forces between them or how this volume was created by this particles or etc. in this thermodynamic system.

We don’t even know whether it is atoms are inside this volume.

You may ask the question,

We don’t know anything about the internal properties but we just define the external properties to understand the thermodynamic system. Doesn’t it meaningless?

It is like explaining an object by just seeing its outside shadow and not caring about its internal structure.

It is true and the doubt is quite meaningful.

Moreover, “Everything depends on the purpose”. If we start to try and analyze the internal structure, we may not get a correct solution or we may get complicated and even we don’t know how to analyze it. There is no information about internal structures at those times.

But for the survival, there is a conditional purpose for the people and scientist to understand a thermodynamic system.

Hence, we forget to care about its internal structure and just put our concern on trying to explain it from the external behaviours.

That is why the thermodynamic relations doesn’t hold good at all situations. But it is a good estimated outline for basic understanding.

And studying the outline to understand its behaviour is not a wrong approach.

Whatever may be the internal structure, the outer structure should be the same for a same state.

It is like from the shadow, for example from a human shadow,

If you predict his behavior, color and etc. it would go wrong.

But the properties of the shadow will not change. From all these things, it is certain that it is a human shadow.

The internal properties may vary accordingly to the same external property.

When the information about the system is more accurately known, the internal behaviours are also predictable based upon those data. And it needn’t to be worried.

Therefore, the external properties are perfectly logical to define a thermodynamic system. But the relations between them needn’t to be an absolutely correct one.

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.  

New Decision – Philosophical Science Society

Practicing for swimming in the ocean is much better than practicing it in a swimming pool. And also the ocean will be more thrilling.

Finding people like you with desired characters is a very occasional thing. But it happens sometimes, also for me. I got exceptional friends with exact similar characters as mine. Everyone loves to be with their friends and so do I.  

I was just discussing with my friends about “what to do after our studies”?

          
         The discussion started as usual but ended with a good decision. We thought about all kind of possibilities. But most of the possibilities implied we can’t be together within the future years.

         
          Getting into the same institute is not possible for all of us. There needs some other way.

So, we tried to figure out a way to be together and also with physics.

          We realized that the only thing we know is a little Physics. Let it be so ...

My friend suggested a beautiful way,

       “What about making a tuition center or an institute for teaching physics, different from others such as schools and other institutions?

All the things were decided in a sudden.

We love teaching physics. And this suggestion compiles all our expectations and moreover it is the most enjoyable one.

          Hence the decision was finalized.

The most inspired words for this decision are from none other than Adolf Hitler.

         

          “If you don’t like something, don’t get rid away from that. Instead get into that thing, and change it completely.”

          It perfectly suited for us, since from our childhood we don’t like the way Physics taught to students. All the people are trained to do something in Physics, but they really don’t understand physics.

We like to change the teaching style and that is the reason we want to become teachers. 

         

          Instead of thinking, we decided to jump.

We thought a lot for the name and finally fixed on the origin name of the Physics itself that is Philosophical Science.

          We named our organization as “Philosophical Science Society”.

         

We started to practice with each other on how to teach. We are sure about only one thing that is we are not going to do the usual stuff as teachers but rather a different stuff as their friends.

 We don’t want to make the place as the tuition center but a place to gather and discuss physics with their friends. Not anything more.

And moreover my friend came up with a temporary symbol for our society,

And thus our Philosophical Science Society was started.