Focus on Carbon (2)

Todays YouTube clip follows on from yesterday. It sets the scene nicely for tomorroews clip but in terms of IB content doesn't really cover anything new. It does nicely deal with the formation of fossil fuels but as stated above, this does not rwally have much bearing on the IB couse. Stick with it though - it does get better! Enjoy http://www.youtube.com/watch?v=cOJ3MUpDrfI&feature=relmfu

Focus on Carbon

I have come across the following YouTube clips on carbon and global warming and thought that I would use them as a mini topic this week. They could, I guess, be used an organic chemistry resource  (OK, obvious, I know), but also used in conjunction with the bonding unit, the energetics unit and the environmental option. ypbb9Zi5Tao  

HD 209458

HD 209458 - one of the first few exoplanets discovered (by the Hubble Space telescope). It was named 'Osiris', after the Egyptian god of the underworld. This planet is large, as large as Jupiter and orbits it's star every three and a half days. What allowed scientists to discover it was that its spectral signature contained hydrogen, oxygen and carbon. The atmosphere is heated to 10,000 oC by the sun. It is thought that a hydrogen wind of evaporating gas drags away ...

Images of atoms

There is a great article on the BBC website - it was published back in 2009 but shows some lovely images of atoms found in carbon nanotubes. You can read more and view the articles by clicking here. By Original hochgeladen von Schwarzm am 30. Aug 2004; Selbst gemacht mit C4D/Cartoonrenderer, GNU FDL [GFDL (http://www.gnu.org/copyleft/fdl.html) or CC-BY-SA-3.0 (http://creativecommons.org/licenses/by-sa/3.0/)], via Wikimedia Commons 

It’s raining …. diamonds?

Diamonds. Image kindly reproduced according to the licence at: http://en.wikipedia.org/wiki/File:Diamond.jpg Artifical diamonds. The hardest ever produced. Made literaly from air! The technique is called 'chemical vapour deposition' and the gems are good enough to be used in jewellry. How? (I hear you ask!) That's the tricky part. A 'rain' of gaseous carbon is deposited onto the surface of an existing diamond, forming a thin film of diamond. The rain is a plasma, generated by bomarding methane and hydrogen with charged particles. The thin film of diamond is then cut up ...

Cold Isotope Chemistry

Isotopes react in the same way, don't they? Chemical reactions are unaffected by the isotopic composition so the percentage of different isotopes of the same element in a substance would be the same as the percentage of each naturally occurring isotope. Well, this is true on earth but it is not the case in space, deep space where the temperature is really low and the concentration of atoms very very small. In effect, one isotope will become more reactive than the other. Scientists have ...

Methane on Mars?

  The Viking landers were sent to Mars by NASA. They landed in 1976, which is a staggering 35 years ago! By NASA / USGS (see PIA04304 catalog page) , via Wikimedia CommonsBoth landers were able to conduct limited experiments by collecting soil samples and analysing them. One experiment involved mixing carbon - 14 labelled nutrients with the soil. If there was some form of life in the soil, it may metabolise the nutrients and produce carbon- 14 methane. By "Roel van ...