STEAM TENSION BELOW 100°C – MOLAR HEAT OF VAPORIZATION Description and Specifications for Lab Tenders
STEAM TENSION BELOW 100 C MOLAR HEAT OF VAPORIZATION.
STEAM TENSION BELOW 100°C – MOLAR HEAT OF VAPORIZATION This equipment enables to study steam tension in the
temperature range of 40-85°C.
Clausius – Clapeyron equation describes the relationship
existing between temperature and pressure.
Carrying out some tests will lead to determine an average
value for the heat of vaporization of water.
250 ml of demineralized water will boil for approximately 10
minutes to eliminate all traces of dissolved gas ; then water is
cooled down to ambient temperature.
The three-neck fl ask is fi lled with gas-free water up to ¾ and
it is heated. As soon as the temperature of 35°C is reached, a
vacuum pump will create vacuum in the space over the water
inside the fl ask. Heating furtherly will provoke an increase of
pressure p and of temperature t inside the fl ask. The values of
“P” and “t” are read on a pressure gauge and on a thermometer
by steps of 5°C up to a maximum temperature t = 85°C. The
values of pressure and temperature can also be detected via
the (optional) data logger.
TRAINING PROGRAM
• pressure
• temperature
• volume
• vaporization
• vapour tension
• Clausius-Clapeyron equation
COMPONENTS
• pressure gauge
• thermometer
• 3-neck fl ask of 100 ml
• vacuum pump
• magnetic stirrer with heating
• glass tube
• rubber pipe for vacuum
• support
• rod of support
• beakers