Chemical Equilibrium

Chemical Equilibrium refers to:

• how fast a physical or chemical change occurs

• how much energy is needed or produced by a physical or chemical change

• how forward vs. reverse does a physical or chemical change toward

Other than the type of chemical, its concentration, and the nearness and interaction that chemical molecules may have, what is the most influencing factor on chemical equilibrium?

• Temperature

• Pressure

• System volume

• Color of chemicals

If a chemical change is exothermic and temperature is increased, then a chemical change will reestablish its direction of chemical change more toward what direction?

• more forward toward products

• more in reverse toward reactants

• the equilibrium will not be affected by temperature changes, so the present equilibrium will be maintained

Decreasing the volume of a chemical system, will increase the number of collisions between reactant chemicals, and therefore do what to the overall pressure between reactant chemicals?

• increase

• decrease

• keep constant

Chemical equilibrium is the study of the balance between reactant vs. product dosage or concentration during a change, specific to certain temperature and pressure.

• true

• false

At zero degree Celsius, or 273 Kelvin, and at specific standard pressure of 1.0 atm or 14.7 psi, what will occur spontaneously?

• liquid water will freeze

• solid water, also known as "ice." will melt

• both liquid water will freeze, and "ice" will melt

At 100.0 degrees Celsius, or 373 Kelvin, liquid water will boil, while at the same time gaseous water, also known as "steam" will condense into liquid water, when at equilibrium, which dependent upon:

• chemical pressure

• chemical temperature

• both chemical pressure and chemical temperature

Chemical equilibrium will shift more toward ___________________ when heat is added to an overall endothermic chemical reaction?

• reactants

• products

• neither, the balance of forward vs. reverse balance will not change

At 100.0 degrees Celsius, or 373.0 degrees Kelvin, equilibrium will be reached between liquid water and steam, when:

• vapor and atmospheric pressure are not equal

• vapor and atmospheric pressure are equal

What is balanced and therefore equal in a chemical change, when chemical equilibrium is reached?

• the amount of starting reactants and resulting new products

• the color of starting reactants and resulting new products

• the speed of the forward change toward products is equal to the speed of the reverse change toward reactants