C6 & C7 Crossword

3. Released or absorbed during chemical reactions, measured in joules.
4. Measure of acidity or alkalinity of a solution.
5. Law stating mass is neither created nor destroyed in a chemical reaction.
6. Reaction where products can react to form the original reactants.
11. Representation of a chemical reaction, showing numbers of reactants and products.
12. Unit of energy.
15. Type of energy stored in bonds of substances.
16. Reaction where a substance gains oxygen.
18. Reaction between an acid and a base, typically releasing energy.
20. Exothermic reaction where a substance reacts with oxygen to release energy.
21. Measure of how quickly a chemical reaction occurs.
22. Substance that speeds up a reaction without being used up.

1. Reaction where a more reactive element replaces a less reactive one.
2. During a reaction, some energy is always transferred/dissipated to the the...
4. Substances formed as a result of a chemical reaction.
7. Reaction that absorbs energy from the surroundings.
8. State in a reversible reaction where forward and reverse rates are equal.
9. Force that holds atoms together in a molecule.
10. Reaction that releases energy to the surroundings, often as heat.
13. Process where substances are transformed into different substances.
14. Substances that start a chemical reaction.
17. Type of energy related to temperature and heat.
19. Minimum energy needed for a reaction to start.
21. Reaction where a substance loses oxygen or gains electrons.
23. A measure of the average kinetic energy of particles.