Heat capacity of gases with Cobra4

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

Cobra4 Wireless/USB-Link incl. USB cable

Cobra4 Sensor-Unit Energy: Current, voltage, work, power

Stopcock,1-way,straight, glass

Stopcock,3-way,t-sh.,capil.,glass

Rubber stopper 26/32, 3 holes 7 mm + 2 x 1,5 mm

Rub.stop.d=59.5/50.5mm, 1 hole

Rubber tubing, i.d. 6 mm

Silicone tubing, inner diameter 3 mm

Nickel electrode,d 3mm,w.socket

Tubing adaptor, ID 3-5/6-10 mm

Scissors,straight,blunt,l 140mm

Weather monitor, 6 lines LCD

Tripod base PHYWE

Syringe 10ml, Luer, 10 pcs

Mariotte flask, 10 l

Precision manometer

On/off switch

Chrome-nickel wire, d.0,1mm,100m

Connecting cord, 32 A, 250 mm, blue

Connecting cord, 32 A, 500 mm, red

Connecting cord, 32 A, 500 mm, blue

curricuLAB measureLAB

PHYWE power supply, 230 V, DC: 0…12 V, 2 A / AC: 6 V, 12 V, 5 A

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

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Product number

P2320261

Heat capacity of gases with Cobra4

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