Express the equilibrium constant for the combustion of ethanol in the balanced chemical equation. c2h5oh(g)+3o2(g)⇌2co2(g)+3h2o(g) express the equilibrium constant for the combustion of ethanol in the balanced chemical equation. a) k=[c2h5oh][o2][co2][h2o] b) k=[co2]2[c2h5oh][o2]3 c) k=[co2]2[h2o]3[c2h5oh][o2]3 d) k=[co2][h2o][c2h5oh][o2]

The correct answer is C where K=[CO2]^2[H2O]^3/[C2H5OH][O2]^3

Explanation:

Equilibrium constant (K) is expressed as the product of all the products divided by the product of all reactants. the coefficient in front of each reactants or products are used as their exponents. Solids and liquids are considered to be 1 hence they are not shown, but in this case everything is in gaseous form thus they are all expressed in the equilibrium formula formula.

answer: c. the experiment shows that the red substance experienced a chemical change.

explanation: chemical change is the change in which chemical composition of the substance changes. physical change is the change in which there is no change in chemical composition.

chemical changes are accompanied by following changes:

a) precipitate formation

b) energy is released or absorbed

c) formation of bubbles

d) change in color

as it is given that the red color has disappeared and there is production of gas, it means the red substance has undergone a chemical change.

e