CO (g) + H 2 (g) <--> C(s) + H 2 O (g) H = -131 kJ A rigid container holds a mix
ID: 527618 • Letter: C
Question
CO (g) + H2(g) <--> C(s) + H2O (g) H = -131 kJ
A rigid container holds a mixture of graphite pellets (C(s)), H2O(g), CO(g), and H2(g) at equilibrium. State whether the number of moles of CO (g) in the container will increase, decrease, or stay the same after each of the following disturbances is applied to the original mixture. For each case, assume that all other variables remain constant except for the given disturbance. Select the response which includes the best explanation.
a. Additional H2(g) is added to the equilibrium mixture at constant volume.
Explanation / Answer
According to Lechatlier's principle, the addition of a substance to an equilibrium increases stress on the equilibrium and shifts it towards the stress-free environment.
Here, the addition of H2 increases the stress on reactant side and hence equilibrium shifts towards right to form the products.