Complete reaction #PbO+C ->Pb+?# Some sources suggest #CO_2# while others #CO#. Do they exist in equilibrium?
This describes the reaction when lead oxide is heated in a furnace with charcoal. Both probably result, but more sources mention carbon dioxide than carbon monoxide.
are more representative of what's happening.
And, regarding equilibrium: every reaction is in equilibrium, but some lie so far toward one side they are simplified with one arrow. I would hypothesize that this reaction proceeds backwards at such a slow rate we can represent the reaction with a one-way arrow.