Why are we considering temperature as constant (isothermal) in the first process of carnot engine?? Physics +1 cbse. (Thermodynamics)
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Hello Friend !
The answer is given below :
First of all let me tell about Carnot Engine.
It is an ideal reversible heat engine that operates between two temperatures T₁(source) and T₂(sink). It was first conceived by a French engineer, Sadi Carnot. It operates through a series of two isothermal and two adiabatic processes called Carnot cycle.
In the first step, cylinder is placed on the source so that the gas acquires the temperature T₁ of the source. The gas is allowed to expand by slow outward motion of the piston. The temperature of the gas falls. As the gas absorbs the required amount of heat from the source, it expands isothermally.
The main reasons for the step to be considered as isothermal may be :
1) First is that it is a theoretical concept in which the heat engine is considered as an ideal heat engine with the efficiency of practical engine is compared. Therefore, we cannot change the concepts ! Instead we will have to study them as they are.
2) The second possible reason for the step to be isothermal may be that if the step was not isothermal and the temperature of the source continued to change , then no such effects could be seen and the gas would not expand then. I would rather increase the complexity of calculating the work done !
Hope this answer clears all your doubts !
The answer is given below :
First of all let me tell about Carnot Engine.
It is an ideal reversible heat engine that operates between two temperatures T₁(source) and T₂(sink). It was first conceived by a French engineer, Sadi Carnot. It operates through a series of two isothermal and two adiabatic processes called Carnot cycle.
In the first step, cylinder is placed on the source so that the gas acquires the temperature T₁ of the source. The gas is allowed to expand by slow outward motion of the piston. The temperature of the gas falls. As the gas absorbs the required amount of heat from the source, it expands isothermally.
The main reasons for the step to be considered as isothermal may be :
1) First is that it is a theoretical concept in which the heat engine is considered as an ideal heat engine with the efficiency of practical engine is compared. Therefore, we cannot change the concepts ! Instead we will have to study them as they are.
2) The second possible reason for the step to be isothermal may be that if the step was not isothermal and the temperature of the source continued to change , then no such effects could be seen and the gas would not expand then. I would rather increase the complexity of calculating the work done !
Hope this answer clears all your doubts !
harishvermabaq:
It is : It would rather increase the complexity of calculating the work done !
Thanks a lot bro
U made me easy
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