a. The boiling point of water is 100°C. The boiling point of hydrogen peroxide is about 150°C. Does this make sense? Why or why not.

• No, it doesn't make sense, because a physical change took place.
• Yes, it makes sense, because we expect products and reactants to have different properties.
• No, it doesn't make sense, because we expect products and reactants to have different properties.
• Yes, it makes sense, because a physical change took place.

The correct answer is:

• Yes, it makes sense, because we expect products and reactants to have different properties.

No, it doesn't make sense, because we expect products and reactants to have different properties.