Answer
a. $$K_c = \frac{[ CH_3CHO ]^{ 2 }}{[ C_2H_4 ]^{ 2 }[ O_2 ]}$$
b. $$K_c = \frac{[ CO_2 ][ H_2 ]}{[ CO ][ H_2O ]}$$
c.$$K_c = \frac{[ NO ]^{ 4 }[ H_2O ]^{ 6 }}{[ NH_3 ]^{ 4 }[ O_2 ]^{ 5 }}$$
Work Step by Step
1. Write the equilibrium constant expression:
- The exponent of each concentration is equal to its balance coefficient.
a. $$K_c = \frac{[Products]}{[Reactants]} = \frac{[ CH_3CHO ]^{ 2 }}{[ C_2H_4 ]^{ 2 }[ O_2 ]}$$
b. $$K_c = \frac{[Products]}{[Reactants]} = \frac{[ CO_2 ][ H_2 ]}{[ CO ][ H_2O ]}$$
c.$$K_c = \frac{[Products]}{[Reactants]} = \frac{[ NO ]^{ 4 }[ H_2O ]^{ 6 }}{[ NH_3 ]^{ 4 }[ O_2 ]^{ 5 }}$$
