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5 Written questions

5 Matching questions

  1. Spontaneous Process
  2. Standard enthalpy of formation
  3. Universe
  4. Hess's Law
  5. Chemical Potential Energy
  1. a system + surroundings
  2. b 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. c a physical or chemical change that occurs with no outside intervention
  4. d energy stored in a compound because of its composition
  5. e 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

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. everything in the universe other than the system
  3. the heat required to vaporize one mole of a liquid
  4. the specific part of the universe that contains the reaction or process that you wish to study
  5. states that spontaneous processes always proceed in such a way that the entropy of the universe increases

5 True/False questions

  1. Enthalpy of reactionthe change in enthalpy for a reaction


  2. Enthalpy of combustionof a substance is the enthalpy change for the complete burning of one mole of the substance


  3. Free Energyability to do work or produce heat


  4. Thermochemical equationbalanced chemical equation that includes the physical states of all reactants and products, and the energy change, usually expressed as the change in enthalpy


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


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