8. Thermochemistry

Which of the following best explains why a solid changes to a liquid when heat is added?

Which of the following actions would most likely cause an increase in the energy of water molecules in liquid water?

Consider the reaction: 2H_2(g) + O_2(g) → 2H_2O(l). Does this reaction absorb or release energy?

Which state of matter has the greatest average kinetic energy of its particles?

Which is the most important factor in determining the state (solid, liquid, or gas) of a substance?

Which type of energy is represented by the change in enthalpy (ΔH) in a chemical reaction?

Which molecule is commonly known as the energy currency of the cell?

Which of the following best explains how heat can be a source of water pollution?

Heat always moves from:

How is energy involved in the change of state, such as melting or boiling, as represented by a molecular model?

When chemical bonds are broken during a reaction, which type of energy is primarily absorbed or released?

What form of energy is stored in food?

As a pot of water is heated, what happens to the molecules in the water?

In a conventional gas furnace, the hot flue gases are ____.

During a chemical reaction, how can energy change within the system?