A. If there is no change in the temp. during the reaction B. If the pressure rem

Question

A. If there is no change in the temp. during the reaction
B. If the pressure remains constant
C. If there is no change in the miles of gas in the reaction
D. (Incorrect) if either Kc or Kp = 1 6. Under what conditions are the values of Kc and Rp for a gas-phase equilibrium the same a. If there is no change in the temperature during the reaction b. If the pressure remains constant If there is no change in the moles of gas in the reaction d, If either Kc or K 1 7. For the chemical equilibrium aA bB cC, the value of the equilibrium constant K is 10. What is the value for K for the reaction cC aA bB? a. -10 (b) 0.1 c. 10 d. 100 8. If the reaction Q has a larger value than the related equilibrium constant K a. reaction is at equilibrium products The reaction will continue to make more c. The reaction will consume products and make reactants d. The value of K will decrease until it is equal to Q 9. In the following reaction, which ofthe statements is true with the given concentrations? K 25 [Coj [H20] 0.020 M, [H2] 0.050 M, [CO2]- 0.040 M a. The reaction is at equilibrium achieve equilibrium b. More hydrogen and carbon dioxide must form to equilibrium More water and carbon monoxide must form to achieve Equilibrium cannot be established in the system 10. Increasing the temperature of a endothermic reaction results in a) More products and fewer reactants More reactants and fewer products c. More reactants and products d. Fewer reactants and products

Explanation / Answer

Note that

aA + bB = cC + dD

for

Kp = Kc*(RT)^dn

where

dn = mol of gases in product - mol of gases in reactants

dn = (C+D) - (A+B)

the only way Kp = Kc

is if dn = 0

so..

there must not be a change in mol of gases

choose C

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