How do you know if equilibrium favors products or reactants?
If Q>K, then the reaction favors the reactants. If Qfavors the products. The ratio of products to reactants is less than that for the system at equilibrium—the concentration or the pressure of the reactants is greater than the concentration or pressure of the products.
What happens when a reaction has reached equilibrium?
A reaction is at equilibrium when the amounts of reactants or products no longer change. Chemical equilibrium is a dynamic process, meaning the rate of formation of products by the forward reaction is equal to the rate at which the products re-form reactants by the reverse reaction.
How do you tell if the forward or reverse reaction is favored?
When the forward reaction is favored, the concentrations of products increase, while the concentrations of reactants decrease. When the reverse reaction is favored, the concentrations of the products decrease, while the concentrations of reactants increase.
Why does the equilibrium constant change with temperature?
Changing temperature Increasing the temperature decreases the value of the equilibrium constant. Where the forward reaction is endothermic, increasing the temperature increases the value of the equilibrium constant. The position of equilibrium also changes if you change the temperature.
What is the effect of adding more water to a system in equilibrium?
on addition of water (that causes the instantaneous dilution, therefore a drop in concentration of the free ions, thus decreasing Q), will shift the equilibrium forward in order to bring Q back to the fixed K value (and vice-versa in the case of water evaporating).
Is volume directly proportional to concentration?
Concentration is inversely proportional to volume; Molarity is expressed in mol L–1, so it is usually more convenient to express volumes in liters rather than in mL; Use the principles of unit cancelations to determine what to divide by what.
What happens to concentration when volume decreases?
If all other factors remain constant, changing the volume occupied by a gas will change its concentration, and therefore, change the rate at which it reacts with other substances. For example, for the following reaction, decreasing the volume occupied by the gases by half will double their concentrations.
Does changing volume affect concentration?
Yes. Concentration of a substance in a solution is defined as the amount of substance dissolved in the solution per unit volume. If the volume of the solution increases while the amount of the substance is kept constant, the concentration decreases.
Why is temperature and volume directly proportional?
Gay Lussac’s Law – states that the pressure of a given amount of gas held at constant volume is directly proportional to the Kelvin temperature. If you heat a gas you give the molecules more energy so they move faster. This means more impacts on the walls of the container and an increase in the pressure.
Is the relationship between pressure and volume direct?
Boyle’s law states that pressure (P) and volume (V) are inversely proportional. Charles’ law states that volume (V) and temperature (T) are directly proportional. Gay-Lussac’s law states that pressure (P) and temperature (T) are directly proportional.
Are volume and moles directly proportional?
A plot of the effect of temperature on the volume of a gas at constant pressure shows that the volume of a gas is directly proportional to the number of moles of that gas. This is stated as Avogadro’s law.
Why is it bad to throw aerosol can into a fire?
You should never throw an aerosol can onto a fire or leave it in direct sunlight – even if it is empty. This is because the pressure will build so up so much that the can will burst (and explode if there is a naked flame nearby). There are two reasons for the pressure going up: the gas pressure increases.
Can an aerosol can explode in a hot car?
Most aerosol cans have warnings reminding users not to store them at temperatures above 120 degrees. The heat inside a car on a hot day can exceed the temperature aerosol cans can withstand, causing them to burst. “Don’t leave aerosol cans in your car. It’s not something we think about every day.
Will aerosol cans explode on a plane?
Aerosol Dangers Anything flammable is carefully regulated, of course, and almost all aerosols are flammable, if only because of the propellant gases used in the cans. The changes in pressure and temperature on an airplane can cause aerosols to leak, ignite or even explode, in rare cases.