Principle


Heat is added to a gas in a glass vessel by an electric heater which is switched on briefly. The temperature increase results in a pressure increase, which is measured with a manometer. Under isobaric conditions a temperature increase results in a volume dilatation, which can be read from a gas syringe. The molar heat capacities are calculated from the pressure or volume change.

Benefits


Determination of cp and cv

For both demonstration and student experiments

Suitable for many different gases

Simplified implementation: all pre-settings already prepared



Tasks

Determine the molar heat capacities of air at constant volume and at constant pressure.

What you can learn about

• Equation of state for ideal gases
• 1st law of thermodynamics
• Universal gas constant
• Degree of freedom
• Mole volumes
• Isobars
• Isotherms
• Isochors and adiabatic changes of state


Software included. Computer not provided.