Chem

2. The energy generated from the movement of atoms.
6. The heat required to raise the temperature of the unit mass of a given substance by a given amount (usually one degree).
8. Energy is transferred through light rays/waves.
9. The type of reaction which absorbs heat.
12. The substances that produce products in a reaction.
15. The process of transfer of energy through direct contact.
16. The energy contained within a system that is responsible for its temperature.
18. The science of determining the change in energy of a system by measuring the heat exchange of the system with the surroundings.

1. The heat absorbed by a unit mass of a given solid at its melting point that completely converts the solid to a liquid at the same temperature: equal to the heat of solidification.
3. The movement of heat by a moving liquid or gas.
4. It is the amount of energy that must be added to a liquid substance to transform a quantity of that substance into a gas.
5. A unit of energy, often used to express the nutritional value of foods, equivalent to the heat energy needed to raise the temperature of 1 kilogram of water by 1 °C.
7. The branch of chemistry concerned with the quantities of heat evolved or absorbed during chemical reactions.
10. The substances that are the results from a chemical reaction.
11. Energy which a body possesses by virtue of being in motion.
13. The type of reaction that releases heat.
14. It is equal to the work done by a force of one newton acting through one metre.
15. A scale of temperature on which water freezes at 0° and boils at 100° under standard conditions.
17. A absolute thermodynamic temperature scale