 myself, Sanjay M. Mutt, assistant professor, mechanical engineering department of Walchand Institute of Technology, Sohla. So, today I am going to that we introduce what is the thermodynamics. There are two three videos regarding on this thermodynamics. So, the first video on this one the only definition of the thermodynamics, the learning outcomes for this video is student will able to define what is the thermodynamics and how you have to define the different thermodynamic systems are to be there. So, friends you regularly use the words thermodynamics. So, what is the thermodynamics in the word of that thermodynamics thermal means heat. So, the effect of heat on different parts of that system that matter that substance when the heat is acting on that some expansion is going on heat is removed means cooling system is going on contraction is going on. So, these are the different what you call properties are to be changed of that substance that matter that working substance. What is the working substance and all these things I will explain later on. So, it is a study that is thermodynamics a study of the energy transfer and its effects on the physical properties of that systems it is a science that deals with relationship between the heat and work heat is acting on that it is converted to some form of work and some form of energy. So, that is a relationship between heat and work and different forms of energy and that different forms of energy is called as a internal energy of that system. So, again that what is the internal energy what is the heat and what is the work that I will explain later on. So, today I am going to only explain the only explain regarding the thermodynamics the definition of the what you call thermodynamics. So, when you go for the definition of the thermodynamics it is a study of that science of the whatever the matter whatever the properties are to be changed when there is a transaction of heat and work is going on. Simple example is to be there I think nowadays each people having minimum one bike is to be there minimum motorcycle is there in that we have to fill that petrol or diesel or fuel on that when the burning is going on heat is to be produced that heat is to be produced is to be converted into the mechanical energy that mechanical energy of different types of air and your bike is to be run and you are moving from one place to the other place that is a type of a thermodynamics. So, it deals with the interactions with the substance that is called as a system. So, this thermodynamics deals with a different laws of energies that is a first law of energy that is a conservation of energy then 0th law of thermodynamics that is a equality of temperature second law of thermodynamics that is a transaction of the heat that is to be going on then the third law of thermodynamics that is absolute that is related to the entropy 0 entropy of that system. So, these are the different criteria different parameter different principle that you have to study in the heading of the thermodynamics. So, basically what is a thermodynamics thermodynamics that is to be deals with the relations between heat and work and that is vice versa that is a different forms of energy and that what you call relation is to be going on that substance that matter that is called as a system of. So, that system sometimes absorbs the heat you get the work of the sometimes you have to remove the heat for that you have to supply the work. So, heat and work they are going on different manners positive or negative when I have to supply the heat of that system that is a positive when I have to remove the heat that is a negative when you get the work from that system in the form of when I have to supply the heat that is a positive and when I have to supply the work that is a negative. So, these are to be related to the thermodynamics system. So, thermodynamics is a broad definition that is not definite definitions for the thermodynamics. So, these parameters you have to study in that thermodynamics. So, when you have to study the thermodynamics some example I will give that is that is the IC engine that is your petrol engine or diesel engine or ELPG or CNG second team steam power plants have to be there where you where water is heat is supplied to that water water is converted to the steam form that steam you pass on to the turbine blades you get the electrical energies to be there then what you call nuclear power plants have to be there due to that fusion process fusion process heat is produced again this pass to the water you get the steam and that steam from that steam you get the mechanical energy. So, these are the different what you call examples you can used or it is applied for that system. So, up till now you have to heard that word you can regularly use that word that is the thermodynamics. But now here after that you can use that word applied manner then some power these are the power producing devices have to be there and some are the power absorbing devices start to be there. You take a simple example in your IC system is to be fitted that is the power consuming devices to be there what you call what you call now air compressors start to be there these are the power producing devices start to be there IC engine is a power producing device air compressor is a power consuming devices start to be there. So, some other devices are to be there that is heat exchangers are there heat engines are there heat pumps are to be there. So, these are the different examples of the thermodynamics. So, when you know the thermodynamics then you go for the thermodynamic system thermodynamic surroundings what is the system? System means that you have to concentrate on particular area to study the behavior of that subject that matter that substance that working substance that pure substance. What are the behavior? Behavior means you have to concentrate on that particular area that is called as a system here I show that is a system. So, on that particular defined area you can check the different properties of that system the properties are related to the pressure volume temperature internal energy heat work. So, these properties you can study it on the defined area that is called as a thermodynamic system outside that thermodynamic system that is called as a surrounding that is called as a surrounding. So, when you have to study the behavior of that matter that substance comparing of that concentrated area that is called as a system with respect to what with respect to the surroundings with respect to the surrounding substances surrounding matter surrounding what is called working substance. And the line which is what you call bifurcate the system and surrounding that is called as a this line is called as a boundary. This line is called as a boundary this line is called as a boundary. So, when you go for a universe it is a addition of the system and surrounding then you say it is a universe ok. Now, when you know the thermodynamics definition when you know the thermodynamic system when you know the thermodynamic power production devices when you know the power consuming devices when you know the different parameters when you know the different characteristics then when you go for the thermodynamic system when you know the thermodynamic surrounding then you go for thermodynamic systems that there are different thermodynamic systems are to be there the thermodynamic systems are open systems, closed system and isolated systems. Open system means what? In the open system, both energy and mass are to be transacted with each other from system to the surrounding and surrounding to the system. On the other hand, a simple example is to be there. You see a simple example of the steam turbine or turbines are to be there. In the turbine, mass is entering in that system and mass is leaving from that system. So, mass is entering and mass of leaving that is one parameter is to be ok. On the other hand, energy is transacted and energy is removed from that system. So, that is a simple example of the open system. Here, both mass and what you call energy both are transacted. On the other hand, when you go for a closed system that is a piston cylinder arrangements are to be there. Here, that is example for the closed system. Here, only energy transmission is to be there. Mass remains constant that is called as a closed system that is to be shown here. That is only energy is to be transmitted. In the previous one, in the open system, mass and energy both are transmitted. Mass is entering and mass is leaving from that system. Energy is entering and energy is leaving from that system. When you go for a closed system, only mass remains constant. Only energy is transmitted from in and out. The third type is to be there that is the isolated system. In the third type that is isolated system means well insulated what you call your AC rooms have to be there in your house AC rooms. In that AC rooms, there is no mass is entering in that system and no mass is leaving from that system. Energy is not transmitted. So, both mass and energy they are not transmitted from that system to the surrounding and surrounding system. So, these are the different type of that systems are there. That is the open system and closed systems are to be there. So, these are the systems when you have to go for that. When you have to study the what you call thermodynamics, then you have to that go for study of this system. Two manners are to be there. You have to study it. Microscopic view and a macroscopic view. M, I, C, R, O, microscopic. That is the individual level you have to study it. Individual molecule level. Suppose you take example of the gas in that chamber on individual level or piston cylinder arrangements are to be there in that gas. It is to be placed in that gas. Each molecule parameters you can check it. That is individual parameters. Which parameter it is pressure, volume, temperature, their vibrational energy, rotational energy, magnetic energy. That individual molecule level you have to study it in that thermodynamic related. That is the individual level that is called as a microscopic point of view to study thermodynamic view. On the other hand, we have to go for a macroscopic. M, A, C, R, O, M, A. That is the average level. That is the microscopic way you have to study it. You can simple example for that. Suppose the room is to be there and the room, the gas is to be there. It is pressure, volume, temperature, mass, M is to be there. If the same chamber you can divide it, but the same gas on the both the chambers are the mass remains the same. That is the average level. That is to be here to check it. Average level you can check it. So, these thermodynamic systems are there. There are not any properties are to be there. They have to be studies in two ways. Microscopic view and microscopic view. These two view you have to be here the matter and substance you can check it. That is a microscopic when you have to go for the kinetic energy of that system and when you have to go for the microscopic view. That is a study of the engineering applications. That is a compressors, turbines. These are the microscopic view and individual level you have to go for the gas that systems that vacuum systems are to be there. That you have to study it here. So, these are the different study you can go for. That is after that system you go for the microscopic view and microscopic view. When you have to compare these two microscopic view and microscopic view, individual level, average level in that when you to go for a micro quantities to be specified in the individual level. It cannot be measured, but when you to go for a microscopic only quantity you have to measure it. That quantity pressure, quantity volume, quantity temperature, average level, average pressure, average volume, average temperature, average entering you can check it. But when you to go for individual microscopic MICR, individual molecule pressure, individual molecule volume, individual molecule temperature, its velocity. All these values at individual level you can check it. In the thermodynamic what you call role you can check it. That is called as a microscopic and microscopic. When you to go for a microscopic one, some assumptions are to be made concerning that structure of that matter. Because when you go for a individual level at that individual level you make some assumptions because individual you are not go for up to that level. So, some assumptions you have to made it. But when you to go for a microscopic there is no what you call description of that matter. Whatever the matter is to be there average pressure, average volume, average temperature you can check. When you to go for other on the other hand when you to go for a microscopic M individual level many quantities needed to be described in that system. But that quantity only few quantities are needed in that microscopic one, microscopic one. So, these are the different parameters you can check it on under what you call microscopic you and microscopic you. So, it is related only I am explaining regarding today only for the definition of thermodynamics and the systems of thermodynamics. Systems are two three types open system, closed system and isolated system. In the open system both mass and energy both are transmitted from system to the surrounding and surrounding to the system. In the closed system only one substance that is a energy to be transacted some system to the surrounding and surrounding to the system mass remains constant and in the isolated system there is no transaction that no mass and no energy transmitted from system to the surrounding and surrounding to the system. So, this is all about the definition of the thermodynamics. For this I am using the references for the RS Khurmi. So, when you go for this one now when you go for open system closed system think over that now what is some few example you give some few example for related to the thermodynamics related to the definition of thermodynamics. Simple example is to be there in your house pressure cooker is to be there that is a one type of thermodynamics what is happened here for that water you can add the heat through the LPG or CNG water it may be that water is converted to the steam pump and that steam is to be used for that. So, here heat is to be converted to heat is transmitted to the water water is converted to steam pump and that steam is converted to the energy. So, it is a simple example of the thermodynamics. So, here after you can study related to the thermodynamics that is applied thermodynamics ok. Thank you.