Answer the following statement(s) true (T) or false (F)
A. The new equilibrium system will contain more C, D and E because higher pressure always favors the products in any reaction equilibrium.
B. The new equilibrium system will contain more C because higher pressure favors the products in the first reaction. The amounts of D and E will be unchanged, since pressure doesn’t affect the equilibrium of the second reaction.
C. The new equilibrium system will have more C because higher pressure favors the products in the first reaction. The amounts of D and E will be lower, because the consumption of more A by the first reaction will cause the second reaction to generate more of it.
D. The new equilibrium system will contain no A because both reactions consume it and the first reaction favors C at higher pressures.
E. Insufficient information to solve.
A. Incorrect. The rationale is faulty. Higher pressure favors the most compact mix of reactants and products (Le Chatelier’s principal).
B. Incorrect. You are halfway right, but your analysis of one of the reactions is not correct.
C. Correct. Le Chatelier’s principal applies to both reactions, so as A is consumed by the first reaction as a response to the pressure increase more A is generated by the second reaction to replace the “lost” A.
D. Incorrect. We do not know how much the pressure has increased, so cannot say that all A has been driven to create C (or D or E).
E. Incorrect. While we cannot quantify the changes without equilibrium constants, it is possible to determine the direction in which the reactions will shift.
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