The standard Gibbs energy of reaction for the decomposition of water
H2O(g) --> H2(g) + 1/2 O2(g)
is 135.2 kJ/mol at 2000K. Suppose that steam at 200 kPa is passed through a furnace tube at 2000K. Calculate the mole fraction of H2(g) in the output gas stream.
sorry, the full question is like that.
First I found k=(p/Po)^1/2* alpha3/2 / 2^1/2 ( 1 - alpha )
using ice table and k value using delta G=RTlnk but I can not understand where should I put the given pressure