Chemistry Class

Question

1. Find the equilibrium constant, Kc, for the equation from the last problem: C12H26 (g) + O2 (g) ⇌ H2O (g) + CO2 (g)
2. [C12H26] = 1.8 x 103 M
3. [O2] = 8.6 x 103 M
4. [H2O] = 1.1 x 103 M
5. [CO2] = 1.1 x 103 M

Answer 1

Balance the equation:

2C₁₂H₂₆ + 37O₂ ⇌ 24CO₂ + 26H₂O

K=equilibrium expression. Products over reactants raised to their coefficients, concentrations are multiplied. Include (aq) and (g) in K expressions (don't include (s) or (l)).

K_C= ( [CO₂]²⁴ [H₂O]²⁶ ) / ( [C₁₂H₂₆]² [O₂]³⁷)

Substitute these numbers into that expression:

1. [C12H26] = 1.8 x 103 M
2. [O2] = 8.6 x 103 M
3. [H2O] = 1.1 x 103 M
4. [CO2] = 1.1 x 103 M