Physical Science - Chapter 7 - Taniyah Elder - PS211 A - 03/25/25

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Across
  1. 3. A chemical reaction that releases more thermal energy than it absorbs
  2. 6. The principle that states that a chemical system in equilibrium will adjust its equilibrium position in such a way as to reduce the effect of any changes made to the system
  3. 7. A substance that is formed during a chemical reaction
  4. 11. A process that rearranges the atoms in one or more substances into one or more new substances
  5. 14. SI fundamental unit for the quantity of matter in a substance
  6. 15. A number placed in front of a chemical formula within a chemical equation that shows how many units of a reactant or product are needed to balance the chemical equation
  7. 17. A combination of chemical formulas and symbols that models a chemical reaction
  8. 18. The minimum energy needed for a chemical reaction to occur
  9. 19. A substance that enters into a chemical reaction
  10. 20. The speed of a reaction
  11. 21. An exothermic chemical reaction in which a fuel reacts with oxygen
  12. 22. A reaction in which the products can react together to re-form the origional reactants
  13. 23. A chemical reaction that absorbs more thermal energy than it releases
Down
  1. 1. A loss of electrons in a chemical reaction
  2. 2. A chemical reaction in which one eleent in a compound in replaced by another element also known as a single-displacement reaction
  3. 4. The model that states that for a reaction to occur, the reactant particles must collide with each other, with the proper alignment, and with enough energy
  4. 5. A chemical reaction in which a single reactant breaks down into two or more products
  5. 8. A chemical reaction in which two or more reactants combine into a single, more complex product
  6. 9. A substance that slows the rate of a reaction by reducing the effectiveness of catalysts
  7. 10. A substance that helps a reaction happen faster but is not used up in the reaction
  8. 12. A gain of electrons in a chemical reaction
  9. 13. The law that states that energu cannot be created or destroyed but only transferred between objects or transformed also known as the first law of thermidynamics
  10. 16. The mass of one mole of a substance