# Second Law of Thermodynamics | Physics Grade 11 Notes

### Thermodynamics

☰   Related Articles

#### Kinematics

Introduction to Kinematics

# Second Law of Thermodynamics

Second Law of Thermodynamics
The second law of thermodynamics can be stated in different ways:

Kelvin’s Statement
According to Kelvin, the second law of thermodynamics can be stated as 'It is impossible to get a continuous supply of work from a body by cooling it to a temperature than that of its surroundings'.
This statement is applicable to heat engines. In a heat engine, the working substance gets some heat from the source, converts a part of it into mechanical work, and rejects remaining part to the sink.

Clausius Statement
According to Clausius, "It is impossible for a self-acting machine unaided by any external energy to convey heat from one body to another at a higher temperature i.e. we cannot make heat flow from a colder body to a warmer body without doing external work".

## Popular Subjects

Join with us on social media to see our updates on your feed.