Examples for

# Chemical Thermodynamics

Chemical thermodynamics describes the physical changes of state within the limits placed by the laws of thermodynamics. Wolfram|Alpha provides thermodynamics equations and computations to determine a variety of chemical properties such as pressure, boiling point and speed of sound for many chemicals and compounds.

### Thermodynamics

Compute thermodynamic properties such as entropy, heat capacity or vapor pressure of a wide variety of chemicals.

#### Find properties of a substance in a given phase:

#### Compute properties at a specified temperature:

#### Compute properties at a specified pressure:

#### Specify temperature and pressure:

#### Do computations with the Arrhenius equation:

#### Calculate heat transfer:

### Estimated Properties

Predict the thermodynamic properties of chemicals using the Joback method.

#### Estimate thermodynamic properties using the Joback method:

Explore properties of molecules in the gas phase using the ideal gas equation of state, Graham's law and many more equations.

#### Compute a property of an ideal gas:

#### Find the properties of a Redlich–Kwong gas:

#### Determine the root-mean-square velocity:

#### Determine the molar mass by comparing gases:

### Goff–Gratch Equations

The Goff–Gratch equations are a pair of thermodynamic equations that describe the relationship between temperature and the saturation vapor pressure near the surface of ice or water.