Unit 11 Thermochemistry

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Across
  1. 2. The temperature at which a solid turns into a liquid.
  2. 4. a physical change in which a substance changes from its solid state directly to its gaseous state.
  3. 7. The temperature at which the vapor pressure of a liquid is equal to the pressure above it.
  4. 9. Nutritional energy unit that is equal to 1000 calories.
  5. 10. A form of potential energy associated with the positions of the particles that compose the chemical system
  6. 12. Reactions that absorb energy from their surroundings.
  7. 15. Law of science stating that energy is neither created nor destroyed.
  8. 17. a physical change in which a substance converts from its liquid state to its gaseous state
  9. 20. The boiling point of a liquid at 1 atmosphere (101.3 kPa).
  10. 21. The capacity to do work.
  11. 22. The quantity of heat required to change the temperature of 1 g of a substance by 1oC.
  12. 24. A physical change in which a substance converts from its liquid state to its gaseous state at the surface of the liquid.
  13. 25. The intermolecular force present in all molecules and atoms. Caused by fluctuations in the electron distribution within molecules or atoms.
Down
  1. 1. A physical change in which a substance converts from its gaseous state to its liquid state.
  2. 3. The amount of heat required to melt 1 mol of a solid
  3. 5. The interaction between two molecules having dipole-dipole moments (the interaction between two polar molecules).
  4. 6. the partial pressure of a liquid’s vapor in dynamic equilibrium with the liquid.
  5. 8. amount of heat required to vaporize one mole of liquid
  6. 11. The amount of thermal energy (or heat) that is emitted or absorbed when a reaction occurs at constant pressure.
  7. 13. The amount of thermal energy (or heat) that is emitted or absorbed when a reaction occurs at constant pressure.
  8. 14. A strong dipole-dipole interaction between molecules containing hydrogen directly bonded to a small, highly electronegative atom, such as N, O, ro F.
  9. 16. The energy associated with the random motions of atoms and molecules.
  10. 18. Attractive forces that exist between molecules.
  11. 19. The energy associated with an object’s motion.
  12. 23. Reactions that release energy into their surroundings.