For which of the following equilibrium reaction, Kc has no units:
Correct answer: C. CO + H2O ----------> CO2 + H2
- A. N2 + 3H2--------> 2NH3
- B. SO2 + 2O2--------> 2SO3
- C. CO + H2O ----------> CO2 + H2
- D. 2NO2 + O2---------> 2NO3
Explanation
There are equal moles of reactants and products therefore Kc will have no units as they get cancelled out.
This question appeared on the UHS MDCAT 2017 paper, which you can sit online with every answer explained.
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About Reversible Reactions
A reversible reaction proceeds in both forward and backward directions, so reactants and products continue changing until dynamic equilibrium is established. The topic covers the meaning of equilibrium, the equality of forward and reverse rates, and how concentration, pressure and temperature disturb equilibrium, which is separate from the rate at which equilibrium is reached.
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