Chemistry Question, Don't really know how to do it lol.

Consider the following reaction at equilibrium: c(s)+h2o(g)⇌co(g)+h2(g) predict whether the reaction will shift left, shift right, or remain unchanged upon each of the following disturbances. a) c is added to the reaction mixture. b) h2ois condensed and removed from the reaction mixture c) co is added to the reaction mixture d) h2 is removed from the reaction mixture.

What is the value of the standard enthalpy of formation of an element in its most stable form?

How is the way a mixture is combined different from how a compound is combined?