Exam 1 review

According to the course tips, are students encouraged to labor over every image included in the material?

• Yes, they should study every image in detail

• No, they don't need to labor over every image

• Yes, but only the images in red

• No, they should ignore all images

What type of reaction is shown at the top of the image where water (H2O) is a product?

• Hydrolysis

• Dehydration synthesis

• Condensation

• Oxidation-reduction

What is the main difference between the reactions labeled "condensation" and "hydrolysis" in the image?

• Condensation reactions use water, while hydrolysis reactions produce water.

• Condensation reactions produce water, while hydrolysis reactions use water.

• Condensation reactions break bonds, while hydrolysis reactions form bonds.

• Condensation reactions involve oxygen, while hydrolysis reactions involve nitrogen.

According to the image, what is the result of the hydrolysis reaction?

• Formation of a single molecule

• Release of energy

• Breaking of a bond

• Removal of a hydroxyl group

What does a positive change in enthalpy (ΔH) indicate about a reaction?

• The reaction is exothermic.

• The reaction is endothermic.

• The reaction is spontaneous.

• The reaction is at equilibrium.

What does a positive change in entropy (ΔS) signify in a system?

• The system is losing freedom.

• The system is gaining energy.

• The system is gaining freedom.

• The system is releasing heat.

Which of the following best describes a negative Gibbs Free Energy (ΔG)?

• The reaction is non-spontaneous.

• The reaction is at equilibrium.

• The reaction is endothermic.

• The reaction is spontaneous and exergonic.

The equation ΔG = ΔH - TΔS is used to calculate what property of a chemical reaction?

• Equilibrium constant

• Reaction quotient

• Gibbs Free Energy

• Activation energy

What does the reaction quotient (Q) compare to determine the direction of a reaction?

• Q compares to the rate constant (k).

• Q compares to the activation energy (Ea).

• Q compares to the equilibrium constant (Keq).

• Q compares to the enthalpy change (ΔH).

Which of the following is NOT a weak force involved in molecular structure

• Covalent

• Hydrogen bonding

• van der waals

• Ionic bonding