Science

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Across
  1. 4. does not allow matter to enter or leave, but does allow energy to enter or leave.
  2. 6. is any process with an increase in the enthalpy H of the system.
  3. 9. is the process or effect of simplifying a single chemical entity into two or more fragments
  4. 10. a chemical reaction between substances
  5. 12. the process of increasing the rate of a chemical reaction
  6. 13. a substance that takes part in and undergoes change during a reaction.
  7. 14. property that is measurable, whose value describes a state of a physical system.
  8. 16. system that can freely exchange matter and energy with its surroundings.
  9. 18. when a substance combines with another to form a new substance, called chemical synthesis
  10. 20. A number placed in front of a formula to balance a chemical equation.
  11. 23. material that can be made to react with other substances
  12. 24. the abundance of a constituent divided by the total volume of a mixture.
  13. 25. he process of transforming a dissolved substance into an insoluble solid
  14. 26. affecting the form of a chemical substance, but not its chemical composition
Down
  1. 1. any substance that has mass and takes up space by having volume.
  2. 2. the symbolic representation of a chemical reaction in the form of symbols and formulae
  3. 3. the artificial execution of chemical reactions to obtain one or several products.
  4. 5. a molecule that binds to an enzyme and decreases its activity.
  5. 7. chemical reaction during which one functional group in a chemical compound is replaced by another functional group.
  6. 8. a process in which one or more substances, also called reactants, are converted to one or more different substances, known as products
  7. 11. formed from chemical reactions.
  8. 15. the minimum quantity of energy which the reacting species must possess in order to undergo a specified reaction
  9. 17. scientific study of the properties and behavior of matter
  10. 19. any system closed to all transfers of matter and energy, the mass of the system must remain constant over time,
  11. 21. is a "reaction for which the overall standard enthalpy change ΔH⚬ is negative.
  12. 22. is a biological catalyst and is almost always a protein