Technical data

Determination of the heat of formation for CO2 and CO (Hess' law)

Article no: P3021601

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

Principle

The standard molar enthalpies of formation Δ_BH^Φ are important compiled thermodynamic tabulation quantities for calculating standard enthalpies of reaction for any arbitrary reaction. They are defined as the heat of reaction occurring in the direct formation of one mole of the pertinet pure substance from the stable pure elements at constant pressure. For spontaneous and quantitative formation reactions, e.g. the conversion of carbon and oxygen to CO₂, standard enthalpies of formation can be measured directly using calorimetry. Alternativly, they can be calculated from known entahlpies of reaction using Hess' law.

Benefits

Glass jacket system easily expandable
Stable and safe construction due to solid stand material

Tasks

Determine the enthalpies of reaction for the combustion of carbon and carbon monoxide calometrically.
Use the experimentally determined enthalpies and Hess' law to calculate the enthalpies of formation of CO and CO_2.

Learning objectives

First law of thermodynamics
Thermochemistry
Calorimetry
Enthalpy of formation
Enthalpy of reaction
Hess' law

Necessary accessories

Precision balance 620g/0.001g

Scope of delivery

Retort stand, h = 750 mm	37694-00	2
Tripod base, triangular, for 6 rods	02007-55	1
Stand rods, stainless steel, various sizes	02031-00	2
Barrel base for 1 rod	02004-00	1
Right angle boss-head clamp	37697-00	6
Universal clamp	37715-01	7
Glass jacket	02615-00	1
Calorimeter insert for glass jacket	02615-01	1
Combustion lance for gases	02613-00	1
Magnetic stirring bar 30 mm, cylindrical	46299-02	1
Magnet, d = 10 mm, l = 200 mm	06311-00	1
Thermometer -10...+50 °C	38034-00	2
Techn. magnifier, 10x, d:23mm	64598-00	1
Funnels (glass), Boro, various sizes	34457-00	1
Graduated beaker, 1000 ml, plastic (PP)	36640-00	1
Paper,ceram.fibre,1.0x500x2000mm	38750-01	1
Gasometer 1000 ml	40461-00	1
Commercial weight, 500 g	44096-50	1
Stopcock,3-way,t-shaped, glass	36731-00	1
Test tube GL25/8, w.hose connec.	MAU-27221000	1
Glass tubes,right-angled	MAU-10030701	1
Pinchcock, width 15 mm	43631-15	1
Funnel for gas generator, 50 ml, GL18	MAU-27222500	1
Round bottom flask, 100ml, GL 25/12	MAU-27100001	1
U-tube with lateral connector, GL 25	MAU-27229500	1
Test tube,180x22 mm, PN19	MAU-17080101	1
Rubber stoppers, without bore, various diameters	39255-00	1
Rub.stop.d=38/31mm,1 hole 15mm	39260-19	1
Test tube holder, up to d 22mm	38823-00	1
Teclu burner, DIN, natural gas	32171-05	1
Safety gas tubing, DVGW, sold by metre	39281-10	1
Hose clip f.12-20 diameter tube	40995-00	2
Lighter f.natural/liquified gases	38874-00	1
Steel cylinder oxygen, 2 l, filled	41778-00	1
Reducing valve f.oxygen	33482-00	1
Wrench for steel cylinders	40322-00	1
Table stand for 2 l steel cylinders	41774-00	1
Hose clip, diam. 8-16 mm, 1 pc.	40996-02	4
Weather monitor with big display	87997-10	1
Mortar with pestle, 150 ml, porcelain	32604-00	1
Scissors,straight,blunt,l 140mm	64625-00	1
Tweezers,straight,blunt, 200 mm	40955-00	1
Water jet pump, plastic	02728-00	1
Rubber hose, various diameters	39282-00	5
Glass wool 10 g	31773-03	1
Charcoal,small pieces 250 g	30088-30	1
Formic acid 75% 250 ml	30023-25	1
Sulphuric acid, 95-97%, 500 ml	30219-50	1
Sodium hydroxide, pellets, 500 g	30157-50	1
Glycerol, 250 ml	30084-25	1