8. Thermochemistry

As thermal energy is added to a substance, which of the following typically occurs?

Which of the following substances stores the most chemical energy per mole?

What is the ultimate source of energy for plants?

Why do water molecules move slower as they are cooled?

The energy needed to destabilize existing chemical bonds and start a chemical reaction is called:

When a log burns in a campfire, which energy transformation primarily occurs?

Which of the following is greater in magnitude for water: the heat of fusion or the heat of vaporization?

Which of the following substances yields the most energy per mole when combusted under standard conditions?

Why does water evaporate slowly compared to many other liquids?

Which of the following observations indicates that a liquid has transferred thermal energy to the air?

When an atom is exposed to an energy source such as electricity, which of the following occurs?

Which of the following substances contains the most usable energy per kilogram?

Which of the following units is commonly used to measure energy in the International System of Units (SI)?

Which process is primarily responsible for transferring heat energy from the Sun to the Earth?

Which one of the following substances would have the highest heat of vaporization?