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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.