Q2-GENRAL CHEMISTRY 2

NAME: (Family Name, First Name, Middle Initial)

SECTION:

• RAMOS
• QUEZON

Which of the following statements is TRUE about entropy?

• A. Entropy is always constant in a reversible process.
• B. Entropy always increases in a spontaneous process.
• C. Entropy is a measure of the disorder or randomness of a system.
• D. Entropy is a state function, meaning it depends only on the initial and final states of the system.

Which of the following processes is MOST likely to result in a decrease in entropy?

• A. Melting of ice
• B. Expansion of a gas
• C. Evaporation of water
• D. Mixing salt and water

Which of these is TRUE about spontaneous processes?

• A. They always release heat.
• B. They always happen quickly.
• C. They always increase disorder.
• D. They always need energy input.

Which of the following statements is TRUE about the energy changes in endothermic and exothermic reactions?

• Endothermic reactions release energy, while exothermic reactions absorb energy.
• Exothermic reactions release energy, while endothermic reactions absorb energy.
• Both endothermic and exothermic reactions release energy.
• Both endothermic and exothermic reactions absorb energy.

A block of ice melts into liquid water. What happens to the entropy of the system?

• A. Entropy changes unpredictably because it's a random process.
• B. Entropy remains the same because the total mass of water doesn't change.
• C. Entropy increases because the water molecules have more freedom to move.
• D. Entropy decreases because the water molecules become more tightly packed

A block of ice melts into liquid water.

• A. Entropy increases.
• B. Entropy decreases.
• C. Entropy remains the same.
• D. Entropy changes unpredictably.

Which of the following is an example of an exothermic reaction?

• Photosynthesis
• Melting ice
• Burning wood
• Dissolving ammonium chloride in water

Which of the following statements BEST describes the second law of thermodynamics?

• A. The entropy of a system can never decrease.
• B. Heat always flows from a hotter object to a colder object.
• C. The total entropy of an isolated system always increases over time.
• D. Energy cannot be created or destroyed, only transferred or transformed.