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5 Written Questions

5 Matching Questions

  1. Energy
  2. Enthalpy (H)
  3. Joule
  4. Enthalpy of reaction
  5. Thermochemistry
  1. a the study of heat changes that accompany chemical reactions and phase changes
  2. b the change in enthalpy for a reaction
  3. c heat content of a system at a constant pressure.
  4. d SI unit of heat and energy (.2390 cals)
  5. e ability to do work or produce heat

5 Multiple Choice Questions

  1. Gibbs free energy (Gsystem) - energy that is available to do work - useful energy
  2. states that if you can add two or more thermochemical equations to produce a final equation for a reaction, then the sum of the enthalpy changes for the individual reactions is the enthalpy change for the final reaction
  3. the specific part of the universe that contains the reaction or process that you wish to study
  4. balanced chemical equation that includes the physical states of all reactants and products, and the energy change, usually expressed as the change in enthalpy
  5. of a substance is the enthalpy change for the complete burning of one mole of the substance

5 True/False Questions

  1. Law of Conservation of Energystates that spontaneous processes always proceed in such a way that the entropy of the universe increases


  2. Heatenergy that is in the process of flowing from a warmer object to a cooler object.


  3. Standard enthalpy of formationheat required to melt one mole of a solid substance


  4. Law of Disorderinsulated device used for measuring the amount of heat lost or gained during a chemical or physical process


  5. Molar Enthalpy of Fusionheat required to melt one mole of a solid substance


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