Thermochemistry: Energy, Systems, and Enthalpy Changes

1234567891011121314151617181920212223242526272829303132333435363738
Across
  1. 2. The type of energy associated with the random motion of atoms and molecules.
  2. 4. Formed during chemical reactions as reagents are consumed.
  3. 6. The amount of heat per unit mass required to raise the temperature by one degree Celsius.
  4. 7. The type of energy stored within the bonds of chemical substances.
  5. 12. The enthalpy it takes for 1 mole of a substance to react fully.
  6. 13. A system that may exchange energy but not matter with the surroundings.
  7. 15. A graph or diagram used to depict energy changes in a chemical reaction.
  8. 20. A substance that takes part in and undergoes change during a reaction.
  9. 21. we assume that dilute aqueous solutions have the same density as what substance.
  10. 22. The study of energy changes that accompany physical, chemical or nuclear changes in matter.
  11. 24. The technological process of measuring energy changes in a chemical system.
  12. 26. When a reaction can be in a forward or backward reaction it is considered what?
  13. 27. An ideal system in which neither matter nor energy can move in or out.
  14. 28. Represents the maximum total potential energy point in a change.
  15. 32. The type of energy stored within the collection of neutrons and protons in the atom.
  16. 33. What is 22.4Lpermol at STP
  17. 34. The mass of a given substance (chemical element or chemical compound) divided by its amount of substance in kg/mol.
  18. 36. Hand warmers rely on _____?
  19. 38. When the change in enthalpy is positive energy is _____?
Down
  1. 1. When the change in enthalpy is negative energy is _____?
  2. 3. "the heat evolved or absorbed in a chemical process is the same whether the process takes place in one or in several steps".
  3. 5. In Hess's Law question's, equations can be _____ or multiplied.
  4. 6. The change of enthalpy from the formation of 1 mole of the compound from its constituent elements, with all substances in their standard states at 1 atmosphere (1 atm or 101.3 kPa).
  5. 8. When the electronic structure of molecules is changed.
  6. 9. We assume that heat absorbed by the container is_____?
  7. 10. A device in which fuel is burned inside an insulated container to measure heat transfer during chemical reactions.
  8. 11. The capacity to do work.
  9. 14. Use these to convert moles in a chemical equation.
  10. 15. Energy available by virtue of an object's position.
  11. 16. This is a measure of the average kinetic energy in a given system.
  12. 17. When the arrangement of protons and neutrons in the nucleus changes.
  13. 18. Any process in which heat has to be supplied to the system from the surroundings.
  14. 19. The type of energy associated with the flow of electrons.
  15. 23. The energy from the system released to or absorbed from surroundings.
  16. 25. A system that may exchange both mass and energy.
  17. 29. All matter around a system that is capable of absorbing or releasing thermal energy.
  18. 30. The energy hump that a reaction must get over before new bonds can form.
  19. 31. Any process that gives off heat, or an output of energy.
  20. 35. Whose number is this, 6.0x10^23?
  21. 37. A measure of the transfer of thermal energy from on system to another.