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5 Written Questions

5 Matching Questions

  1. Enthalpy (H)
  2. Standard enthalpy of formation
  3. Law of Conservation of Energy
  4. Free Energy
  5. Thermochemistry
  1. a in any chemical reaction or physical process, energy can be converted from one form to another, but it is neither created nor destroyed
  2. b ΔHf° defined as the change in enthalpy that accompanies the formation of one mol of the compound in its standard state from its constituent elements in the standard states
  3. c Gibbs free energy (Gsystem) - energy that is available to do work - useful energy
  4. d heat content of a system at a constant pressure.
  5. e the study of heat changes that accompany chemical reactions and phase changes

5 Multiple Choice Questions

  1. balanced chemical equation that includes the physical states of all reactants and products, and the energy change, usually expressed as the change in enthalpy
  2. the specific part of the universe that contains the reaction or process that you wish to study
  3. the heat required to vaporize one mole of a liquid
  4. a physical or chemical change that occurs with no outside intervention
  5. amount of heat required to raise the temp of one gram of that substance by one degree Celsius

5 True/False Questions

  1. Jouleamount of heat required to raise the temperature of one gram of pure water by one degree Celsius


  2. Molar Enthalpy of Fusionthe heat required to vaporize one mole of a liquid


  3. Hess's Lawstates 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. Surroundingseverything in the universe other than the system


  5. Enthalpy of combustionthe change in enthalpy for a reaction


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