Le Chatelier\'s Principle If a stress is applied to a reaction mixture at equili
ID: 997296 • Letter: L
Question
Le Chatelier's Principle If a stress is applied to a reaction mixture at equilibrium, a net reaction occurs in a direction that relieves the stress. In which of the following equilibria would an increase in pressure promote the formation of more products? N_2(g) + O_2(g) doubleheadarrow 2 NO (g) 2 NO (g) + O_2(g) doubleheadarrow 2 NO_2 (g) N_2O_4 (g) doubleheadarrow 2 NO_2 (g) H_2O (I) + CO_2 (g) doubleheadarrow H_2CO_3 (aq) CaC0_3(s) doubleheadarrow CaO (s) + CO_2 (g) In which direction would the equilibria shift if heat were added to the reaction? CaC0_3(s) doubleheadarrow CaO (s) + CO_2 (g) endothermic reaction CH_4 (g) + O_2(g) doubleheadarrow CO_2(g) + 2 H_2O (I) exothermic In which direction would the equilbria shift if the following materials were to be added: He, CO_2, H_2CO_3, large amount of H_2O (this last one is tricky). H_2O (I) + CO_2 (g) doubleheadarrow H_2CO_3 (aq)Explanation / Answer
3. (b) and (d). As in both of them the molecules on RHS is less than the molecules on LHS.
(f) The equilibrium will shift towards right
(g) The equilibrium will shift towards left
(h) He is inert. It will decrease the reactivity and equilibrim will shift to left.
CO2. equilibrium will shift towards right
H2O. equilibrium will shift towards right
H2CO3. equilibrium will shift towards left
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