8. Thermochemistry

When hydrogen gas (H_2) reacts explosively with oxygen gas (O_2) to form water, where does the released energy originate?

Which type of energy is stored in a chemical bond?

Which of the following examples involves an energy change of the system?

What is the original source of almost all energy in most ecosystems?

Which of the following is a primary method by which heat is transferred from one object to another?

Why is a steam burn typically more severe than a hot water burn?

Why does a hot water bottle feel warm when you touch it?

Energy from the sun comes from fusion. What happens during that reaction?

Which of the following best describes what thermal energy refers to?

Which statement best describes the difference between heat and thermal energy?

The energy for an endergonic reaction comes from a(n) _____ reaction.

When energy is added to liquid water, what do you expect will happen to the water molecules?

Which of the following is NOT a way for heat to be transferred from one object to another?

Which of the following is considered a renewable source of energy?

Which of the following best explains the energy transformation that occurs in hydrogen fuel cells?