CROSSWORD

5. is one which results in a net decrease in temperature because it absorbs heat from the surroundings and stores the energy in the bonds formed in the reaction
7. is a mathematical relationship obtained by comparing reaction rates with reactant concentrations
8. is a decrease in volume due to the lower internal pressure
10. is the process of measuring the amount of heat released or absorbed during a chemical reaction
12. is a chemical change which forms new substances
14. the minimum amount of energy that is required to activate atoms or molecules to a condition in which they can undergo chemical transformation or physical transport
16. is a chemical reaction wherein the rate does not vary with the increase or decrease in the concentration of the reactants
17. is a chemical reaction that releases energy through light or heat
18. refers to the amount of a substance per defined space
20. is the study of the heat energy which is associated with chemical reactions and/or physical transformations

1. is a force exerted by the substance per unit area on another substance
2. are substances initially present in a chemical reaction that are consumed during the reaction to make products
3. refers to the spatial dilation of a material that occurs upon changes in its composition
4. is the quantity of three-dimensional space occupied by a liquid, solid, or gas
6. is the branch of physical chemistry that is concerned with understanding the rates of chemical reactions
9. the speed at which a chemical reaction proceeds
11. the branch of physical science that deals with the relations between heat and other forms of energy
13. is a reaction that proceeds at a rate that depends linearly on only one reactant concentration
15. is always defined in terms or reactant (not product) concentrations
19. is the sum of the internal energy added to the product of the pressure and volume of the system