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5 Written questions

5 Matching questions

  1. Heat
  2. Thermochemistry
  3. Hess's Law
  4. Thermochemical equation
  5. Chemical Potential Energy
  1. a the study of heat changes that accompany chemical reactions and phase changes
  2. b balanced chemical equation that includes the physical states of all reactants and products, and the energy change, usually expressed as the change in enthalpy
  3. c 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
  4. d energy that is in the process of flowing from a warmer object to a cooler object.
  5. e energy stored in a compound because of its composition

5 Multiple choice questions

  1. in any chemical reaction or physical process, energy can be converted from one form to another, but it is neither created nor destroyed
  2. states that spontaneous processes always proceed in such a way that the entropy of the universe increases
  3. Gibbs free energy (Gsystem) - energy that is available to do work - useful energy
  4. insulated device used for measuring the amount of heat lost or gained during a chemical or physical process
  5. system + surroundings

5 True/False questions

  1. Molar Enthalpy of vaporizationthe heat required to vaporize one mole of a liquid


  2. Entropymeasure of the disorder or randomness of the particles that make up a system


  3. Enthalpy of combustionthe change in enthalpy for a reaction


  4. calorieamount of heat required to raise the temperature of one gram of pure water by one degree Celsius


  5. JouleSI unit of heat and energy (.2390 cals)


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