Introduction to Le Chatelier's Principle

AP Chemistry· difficulty 3/5

N2 + 3 H2 <-> 2 NH3 (in rigid vessel) time add Ar N2/H2 NH3

Why does adding inert Ar at constant V cause no shift?

  • A

    K depends on inert gases

  • B

    Ar consumes NH3

  • C

    Partial pressures of reacting gases are unchanged

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  • D

    Volume increases

Explanation

At constant volume, adding inert gas raises total pressure but does not change the partial pressures or concentrations of reacting species, so Q = K and no shift occurs.

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