hello George

Here you go George, as requested. You must be special, you've got your own post. This is the CHEM2 paper you did last summer with the corresponding mark scheme.

CHEM2 June 09 paper

CHEM2 June 09 mark scheme

Good luck with it tomorrow. If you need anything else or any last minute help use the email at the top of the page (reasonable hours though eh?)

module 4 apology

As someone has just pointed out, the links I put into a recent post for module 4 resources for the mark schemes for two papers actually took you to the paper itself, not the answers.

Never mind.

As some of you will have already worked out, if you follow the link further down the post to older module 4 papers you can find all the papers and mark schemes your heart desires, including the ones with the erroneous links.

I've put the link here again if you need it.

old module 4 papers and mark schemes

explosion of the month 3

Ethyne gas, C₂H₂, (commonly called acetylene)



is often used in welding to generate the intense heat required to cut through metal. Oxyacetylene is the hottest burning common fuel gas and combustion of acetylene with oxygen produces a flame with a temperature of over 3600 K (about 3300 °C).

As you can imagine, when a cylinder of the stuff leaked in a factory in Dallas, Texas, and accidently ignited, this was not entirely good news for the nearby residents and commuters. Particularly as it was being stored with a large number of other cylinders of the gas.