Product details

  • Determination of the enthalpy of vaporisation of liquids with Cobra4
  • Determination of the enthalpy of vaporisation of liquids with Cobra4
Determination of the enthalpy of vaporisation of liquids with Cobra4 Determination of the enthalpy of vaporisation of liquids with Cobra4

Determination of the enthalpy of vaporisation of liquids with Cobra4

Item no.: P3020461
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  • Description
  • Scope of Supply
  • Accessories
  • Downloads and Documents

Principle

The vaporisation of a liquid occurs with heat absorption. To determine the enthalpy of vaporisation, a known mass of the liquid which is to be investigated is vaporised in a special vaporisation vessel in a current of air. The quantity of heat absorbed, which corresponds to the enthalpy of vaporisation, can be calorimetrically determined.

Benefits

  • Simplified implementation: all pre-settings already prepared
  • Part of a system solution - Easily expandable for further experiments
  • Calorimeters with particularly high capacitance

Tasks

  1. Determine the molar enthalpy of vaporisation of diethyl ether and methanol.
  2. Calculate the molar entropies of vaporisation and discuss the results under consideration of Trouton's rule.

What you can learn about

  • Enthalpy of vaporisation
  • Enthalpy of condensation
  • Enthalpy of sublimation
  • Vapour pressure
  • Entropy of vaporisation
  • Clausius-Clapeyron equation
  • Trouton's rule
  • Law of thermodynamics
  • Calorimetry

Necessary accessories

  • Precision balance 620g/0.001g
  • Precision balance 6200g/0.01g

Software included. Computer not provided.

Device Name Item no. Qty
measureLAB, multi-user license 14580-61 1,00
Erlenmeyer flask, borosilicate, wide neck, 250 ml 46152-00 1,00
Retort stand, h = 750 mm 37694-00 1,00
Glass tubes, right-angled, 10 36701-57 1,00
Separator for magnetic bars 35680-03 1,00
Cobra4 Mobile-Link 2 incl. accessories: battery, USB cable, charger and SD memory card 12620-10 2,00
Evaporation vessel for calorim. 04405-00 1,00
Hose clip f.12-20 diameter tube 40995-00 5,00
Air control valve 37003-00 1,00
Cannula 0.9x70mm, Luer, 20 pcs 02597-04 1,00
Rubber caps, 10 pcs 39275-03 1,00
Magnetic stirring bar 30 mm, oval 35680-04 1,00
Cobra4 Sensor-Unit Temperature 12640-00 1,00
Heating coil with sockets 04450-00 1,00
Wash bottle, plastic, 500 ml 33931-00 1,00
PHYWE power supply, universal DC: 0...18 V, 0...5 A / AC: 2/4/6/8/10/12/15 V, 5 A 13504-93 1,00
Water jet pump, plastic 02728-00 1,00
Rubber tubing, i.d. 6 mm 39282-00 1,00
Glass tube, right-angled 36701-07 1,00
Cobra4 Sensor-Unit Energy: Current, voltage, work, power 12656-00 1,00
Connecting cord, 32 A, 500 mm, black 07361-05 4,00
Supp.rod stainl.st.,50cm,M10-thr. 02022-20 1,00
Right angle boss-head clamp 37697-00 3,00
Security bottle with manometer and three-way stopcock 34170-88 1,00
Calorimeter, transparent, 1200 ml 04402-00 1,00
Rubber tubing,vacuum,i.d.6mm 39286-00 1,00
Diethyl ether 250 30007-25 1,00
Magnetic stirrer with heater MR Hei-Standard 35751-93 1,00
Syringe 20ml, Luer, 10 pcs 02591-03 1,00
Universal clamp 37715-00 3,00
Water, distilled 5 l 31246-81 1,00
Title Item no.
Required Accessories
Document     Filesize
p3020461e.pdf Experiment guide, English 356.62 KB

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