On Friday 06 April 2007 08:40, Burnham-Slipper Hugh wrote: > The rate of the carbon-monoxide-to-carbon-dioxide reaction is > given by: > > [CO] x [O2]^0.25 x [H2O]^0.5 x 2.24e12 x exp(-1.8e8/RT) Wow, where does that lot come from, it looks like a partial pressures sum? Can you explain a bit more? What happened to the nitrogen? AJH