First law of thermodynamics:-
- Energy can neither be created nor be destroyed it is transferred from one to another form
- Any loss or gain of energy by the system must be equal to loss or gain of energy by the surrounding.
- Any heat is given to the system that heat increase system internal energy and utilized to do some work done.
dQ = dU + dW
Second law of thermodynamics:-
- As per second law of thermodynamic there are not any heat engine are available to convert energy into 100% work. We do not convert or utilize energy into 100% work done.
- There are two statement of two different scientist.
1.Kelvin laws
2.Clausis law
Kelvin laws: It stated that it is impossible to make such heat engine that convert 100% work done from given source of heat.
Clausis law: It state that heat never flow from low temperature to high temperature because of heat transferred from high temperature to low temperature owing existence in temperature difference.
Third law of thermodynamics:-
- Third law of thermodynamics depend on three main components;
1.)Entropy:it is measure disorder of system
2.)Absolute zero: temp. is about 0°K
3.)Absolute crystals
- Third law states that entropy of absolute crystals at 0°K or -273 °C is zero
