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Description
Part 1 - Use of the gas syringe in the home experiment which determines molar mass of a volatile liquid by Victor Meyer's method. Part 2 - Aspects of oxygen and nitrogen examined.
Part 1 - Use of the gas syringe in the home experiment which determines molar mass of a volatile liquid by Victor Meyer's method. Part 2 - Aspects of oxygen and nitrogen examined.
| Item code: | S25-; 09 |
|---|---|
| First transmission date: | 20-05-1972 |
| Published: | 1972 |
| Rights Statement: | |
| Restrictions on use: | |
| Duration: | 00:24:12 |
| + Show more... | |
| Producer: | David Jackson |
| Contributors: | Charles Harding; Len Haynes; Joan Mason |
| Publisher: | BBC Open University |
| Keyword(s): | Bonding; Decomposition reactions; Gas syringe home kit; Lewis theory; Magnetic properties; Molecular orbital diagram; Molecular weight; Reactivity of oxygen |
| Footage description: | Len Haynes introduces the programme. Joan Mason demonstrates the Victor Meyer method for determining the molar mass of a given volatile liquid. (This is a demonstration of the Koine experiment). Len Haynes introduces the main topic of the programme: a comparison of some aspects of the chemistry of nitrogen and oxygen. He demonstrates the decomposition of hydrogen peroxide to give water and oxygen. Platinum black is used as a catalyst. Haynes then demonstrates the analogous reaction - hydrazine decomposed to give ammonia and nitrogen. Haynes relates the exothermicity of the reactions to the strengths of the bonds which are broken and formed. Haynes then discusses the Lewis structure for oxygen and nitrogen. Charlie Harding gives a clue to the difference of reactivity by demonstrating an experiment first done by Faraday. He induces a paramagnetic effect in liquid oxygen then tries the same with nitrogen. Harding discusses the bonding of oxygen with reference to molecular orbital theory. Len Haynes relates the molecular orbital picture of oxygen to its reactivity by demonstrating its explosive reaction with hydrogen. Joan Mason explains that speed not exothermicity was the reason for the explosive reaction. She then goes through the reactions step by step from initiation through propagation (both chain and branching) to termination. She uses a mag. board to show the equations. Harding looks at the nitrogen-hydrogen reaction and the reasons for its unreactivity. |
| Master spool number: | 6HT/70454 |
| Production number: | 00521_2196 |
| Videofinder number: | 1777 |
| Available to public: | no |
