4 Thermodynamics 4.1 Temperature and the Kinetic Theory of Gases
Vapour pressure of water at high temperature
P2340100 Principle The high-pressure steam apparatus makes it possible to measure steam pressure in a temperature range of 100-250째C. This allows for investigations to be performed on real gases and vapours. Typical equilibrium states between gas and liquid phases can be set up. For this purpose, water is heated in a closed pressure chamber at constant volume. The heat of vaporisation is determined at various temperatures from the measurement of vapour pressure as a function of temperature.
For more details refer to page 103.
Vapour pressure of water below 100째C - molar heat of vaporisation
P2340200
Principle The vapour pressure of water in the range of 40째C to 85째C is investigated. It is shown that the Clausius-Clapeyron equation describes the relation between temperature and pressure in an adequate manner. An average value for the heat of vaporization of water is determined.
For more details refer to page 104.
Barometric height formula
P2140700 Principle Glass or steel balls are accelerated by means of a vibrating plate, and thereby attain different velocities (temperature model). The particle density of the balls is measured as a function of the height and the vibrational frequency of the plate.
For more details refer to page 53.
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