- Title Pages
- Dedication
- Acknowledgements
- 1 How to use this book(†)
- 2 Introducing thermodynamics
- 3 A survey of thermodynamic ideas
- 4 Some general knowledge
- 5 Mathematical tools
- 6 Zeroth law, equation of state
- 7 First Law, internal energy
- 8 The Second Law and entropy
- 9 Understanding entropy
- 10 Heat flow and thermal relaxation
- 11 Practical heat engines
- 12 Introducing chemical potential
- 13 Functions and methods
- 14 Elastic bands, rods, bubbles, magnets
- 15 Modelling real gases
- 16 Expansion and flow processes
- 17 Stability and free energy
- 18 Reinventing the subject
- 19 Thermal radiation
- 20 Radiative heat transfer
- 21 Chemical reactions
- 22 Phase change
- 23 The Third Law
- 24 Phase change, nucleation, and solutes
- 25 Continuous phase transitions
- 26 Self-gravitation and negative heat capacity
- 27 Fluctuations
- 28 Thermoelectricity and entropy flow
- A Electric and magnetic work
- B More on natural variables and free energy
- C Some mathematical results
- Bibliography
- Index

# Zeroth law, equation of state

# Zeroth law, equation of state

- Chapter:
- (p.52) 6 Zeroth law, equation of state
- Source:
- Thermodynamics
- Author(s):
### Andrew M. Steane

- Publisher:
- Oxford University Press

The definition of empirical temperature is carefully explained, through the use of the zeroth law of thermodynamics. The equation of state (relating temperature to other state variables) is introduced. The ideal gas is formally defined. Some example equations of state are given, for a gas, thermal radiation, a solid at high pressure (Murnaghan equation), a spring, an ideal elastic, and a paramagnet. Magnetism is introduced, with the definition of magnetization, and Curie’s law. The principles of thermometry are outlined.

*Keywords:*
Zeroth law, temperature, equation of state, ideal gas, Murnaghan equation, magnetization, Curie’s law, thermometry

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- Title Pages
- Dedication
- Acknowledgements
- 1 How to use this book(†)
- 2 Introducing thermodynamics
- 3 A survey of thermodynamic ideas
- 4 Some general knowledge
- 5 Mathematical tools
- 6 Zeroth law, equation of state
- 7 First Law, internal energy
- 8 The Second Law and entropy
- 9 Understanding entropy
- 10 Heat flow and thermal relaxation
- 11 Practical heat engines
- 12 Introducing chemical potential
- 13 Functions and methods
- 14 Elastic bands, rods, bubbles, magnets
- 15 Modelling real gases
- 16 Expansion and flow processes
- 17 Stability and free energy
- 18 Reinventing the subject
- 19 Thermal radiation
- 20 Radiative heat transfer
- 21 Chemical reactions
- 22 Phase change
- 23 The Third Law
- 24 Phase change, nucleation, and solutes
- 25 Continuous phase transitions
- 26 Self-gravitation and negative heat capacity
- 27 Fluctuations
- 28 Thermoelectricity and entropy flow
- A Electric and magnetic work
- B More on natural variables and free energy
- C Some mathematical results
- Bibliography
- Index