Chemistry Unit 7 and 8

Question

1. Find the equilibrium constant, Kc, for the equation from the last problem: C12H26 (g) + O2 (g) ⇌ H2O (g) + CO2 (g)

>[C12H26] = 1.8 x 103 M

>[O2] = 8.6 x 103 M

>[H2O] = 1.1 x 103 M

>[CO2] = 1.1 x 103 M

Answer 1

Hello. First one will need to balance the equation, because the coefficients are important when solving for K_c.

If you agree with a balanced equation of 2C₁₂H₂₆ + 37O₂ <----> 24CO₂ + 26H₂O, then we may proceed.

To solve for K_c, we put products over reactants (products divided by reactants) as in the following equation:

K_c = [1.1 x 10³]²⁴[1.1 x 10³]²⁶ / [1.8 x 10³]²[8.6 x 10³]³⁷

Hopefully that helps...