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This programme investigates the directional nature of several chemical reactions and studies the efficient production of hydrogen gas.
Metadata describing this Open University video programme
Module code and title: S247, Inorganic chemistry: concepts and case studies
Item code: S247; 02
First transmission date: 1981
Published: 1981
Rights Statement:
Restrictions on use:
Duration: 00:24:00
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Producer: Barrie Whatley
Contributors: David Johnson; Kiki Warr
Publisher: BBC Open University
Keyword(s): Decomposition of steam; Economy thermal; Energy hydrogen; Equilibrium; Experiments; Gibbs; Graphics; Nature of chemical; Thermodynamic
Subject terms: Chemical reactions; Chemistry, Inorganic
Footage description: Footage - Plate of chips and salt showing stability of sodium chloride under normal conditions. Sodium lowered into chlorine produces, via a spectacular reaction, sodium chloride (0'00"-1'22") - Scene of skier skiing downhill then climbing back up to show analogy of the direction of a chemical system. Demonstration of the Gibbs function (1'23"-3'12") - Experiment demonstrating the dissociation of dinitrogen tetroxide to nitrogen dioxide and the direction of spontaneous change towards a state of equilibrium. Representing this idea on a changing graph of free energy curves and through equations (3'13"-13'53") - Experiment demonstrating the decomposition of water into hydrogen and oxygen. Experiment demonstrating the reverse process: hydrogen burns in air to produce water (13'54"- 15'14"). Fossil fuel-driven energy consumption: scenes of electric lighting, road oil tanker, power station, natural gas flame. Scenes of hydrogen fuelled home, woman cooking with hydrogen gas, pipes carrying hydrogen and being laid. Graph comparing the cost of transporting electricity (pylons) and gas (pipes). Scene of man operating a hydrogen powered vehicle. Man drinking water emitted by exhaust. Hydrogen powered bus. Interior and exterior scenes of hydrogen plant (production from gas). Making hydrogen from water by electrolysis. Scene of nuclear power plant, solar collector (15'15"-17'51") - Experiment demonstrating the efficiency of producing hydrogen from a thermal energy source via electrolysis. Graph showing free energy curves used to pinpoint the optimum temperature for the most efficient production of hydrogen (17'52"-19'51"). Experiment demonstrating the production of hydrogen and magnesium oxide by heating magnesium in steam. Experiment demonstrating the decomposition of mercuric oxide into mercury and oxygen. General equations for both reactions (19'52"-22'49").
Master spool number: HOU3425
Production number: FOUS081Y
Videofinder number: 1960
Available to public: no