8. Thermochemistry

A pressure cooker allows food to be cooked under high pressure. Why is this useful?

Which of the following best describes what happens when the thermal energy of a substance increases?

Which of the following reasons explains why a steam burn is more severe than a hot water burn?

When matter is heated, what happens to the particles within it?

Does a change in energy always indicate that a chemical reaction has taken place?

Which of the following statements concerning energy changes in chemical reactions is false?