When a chemical reaction is at equilibrium, Q (the reaction quotient) is equal t

Question

When a chemical reaction is at equilibrium, Q (the reaction quotient) is equal to K (the equilibrium constant). If a stress is applied to the mixture that changes the value of Q, then the system is no longer at equilibrium. To regain equilibrium, the reaction will either proceed forward or in reverse until Q is equal to K once again. Alternatively, equilibrium can be disrupted by a change in temperature, which changes the value of K The result however is the same, and the reaction will proceed forward or in reverse until Q is equal to the new K. Le Chatelier's principle summarizes this idea: If a stress is applied to a reaction mixture at equilibrium, a net reaction occurs in the direction that relieves the stress. Consider the following system at equilibrium: 2A(aq) 4 + 2B(aq) double arrow 5C(aq) Classify each of the following actions by whether it causes a leftward shift, a rightward shift, or m shift in the direction of the net reaction. Drag the appropriate items to their respective bins. The following system is at equilibrium: 3M(g) + N(s) double arrow 2L(g) Classify each of the following actions by whether it causes a leftward shift, a rightward shift, or n. shift in the direction of the net reaction. Drag the appropriate items to their respective bins. For a certain chemical reaction, AH degree = - 156 kJ. Assuming the reaction is at equilibrium, class each of the following actions by whether it causes a leftward shift, a rightward shift, or no shift in direction of the net reaction. Drag the appropriate items to their respective bins.

Explanation / Answer

A)leftward shift-increase C, decrease A, decrease B, double both B and C

rightward shift-increase A, increase B, decrease C

no shift- double A and reduce B to half

B)leftward shift- increase the volume

rightward shift-decrease the volume

no shift-add more N, remove more N

C)left ward shift -increase the temperature

rightward shift-decrease the temperature

no shift- N/A

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