For example , the decomposition of phosphine ( PH ) on a hot tungsten surface at high pressure is zero order in phosphine which decomposes at a constant rate .
Similarly reactions with heterogeneous catalysis can be zero order if the catalytic surface is saturated .
The decomposition of phosphine ( PH ) on a hot tungsten surface at high pressure is zero order in phosphine which decomposes at a constant rate .
Similarly reactions with heterogeneous catalysis can be zero order if the catalytic surface is saturated .