DIA Review Part 1

• Elements dissociated into ions

• Potential energy increased

• intermolecular forces of attraction decreased

• Molecules broke apart into atoms

How are the intermolecular forces ranked from strongest to weakest?

• dispersion forces, hydrogen bonding, dipole-dipole forces

• Hydrogen bonding, dipole-dipole forces, dispersion forces

• dipole-dipole forces, hydrogen bonding, dispersion forces

• hydrogen bonding, dispersion forces, dipole-dipole forces

How are the intermolecular forces ranked from weaksest to strongest?

• hydrogen bonding, dipole-dipole forces, hydrogen bonding

• dipole-dipole forces, dispersion forces, hydrogen bonding

• dispersion forces, dipole-dipole forces, hydrogen bonding

• hydrogen bonding, dispersion forces, dipole-dipole forces

Which statement about the pictured chemical reaction is true?

• Both reactions proceed at the same rate

• Reaction B is slower because the activation energy is higher

• Reaction B is faster because the activation energy is higher

• Reaction A is slower because of lower activation energy

Which of the following is true regarding endothermic and exothermic chemical reactions?

• Endothemric reactions occur when electrons are shared between atoms; exothermic reactions occur when electrons are transferred.

• Energy is conserved in endothermic reactions and but is not conserved in exothermic reactions

• Energy is absorbed in endothermic reactions and released in exothemric reactions

Which of the following statements describes the relationship between reactants and products?

• The potential energy difference between the reactants and the products will be released as thermal energy.

• The potential energy difference between the reactants and the products will be released as kinetic energy.

• The potential energy of the reactants is greater than the potential energy of the products.

• The potential energy of the products is greater than the potential energy of the reactants

Why does water have an unusually high boiling point?

• The atoms in water are attached by covalent bonds.

• Water is composed of nonmetals.

• The molecular mass of water is very low.

• water forms hydrogen bonds

Why is the temperature constant in segment 4?

• heat is being converted into potential energy

• heat is remaining constant

• heat is being released

• heat is being converted into kinetic energy

How does a catalyst change the rate of reaction?

• increases heat within the reaction

• decreases heat within the reaction

• lowers activation energy

• raises activation energy

Which of the follwoing potential energy differences would change if a catalyst was introduced into the chemical equation?

• A

• B

• C

• D