Thermochemistry

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  1. 4. The SI unit of energy. 4.18 of these equal 1 cal
  2. 5. the amount of heat needed to raise the temperature of just 1 gram of an object by 1℃. A gallon of water has the same as a cup of water
  3. 6. the enthalpy when a solute dissolves in a solvent at the same pressure, which results in infinite dilution. Enthalpy of solution = enthalpy of dissolution + lattice energy
  4. 8. When heat flows into the system. The “q” is positive because the system GAINED heat
  5. 13. a device to measure the amount of heat involved in a chemical reaction, and measures changes in heat energy
  6. 14. the amount of energy needed to change a mole from a liquid to a gas, while staying at the same temperature and pressure
  7. 15. The amount of heat energy needed to raise the temperature of an object by 1℃. It takes more energy to heat a gallon of water compared to a cup
  8. 16. The capacity or power for doing work, for example the force needed to move an object. It exists is many different forms
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  1. 1. q = mcΔT where q = heat energy, or cal and J. m equals the mass, c is the specific heat, and ΔT is the change in temperature
  2. 2. the container of the system. Contains the room you are in and the whole universe
  3. 3. the amount of energy needed to change a mole from a solid to a liquid, while staying at the same temperature and pressure
  4. 5. Your focus of attention, where the reaction or the phase change takes place
  5. 7. When heat flows out of the system. The “q” is negative because the system LOST heat
  6. 9. Two types. One is amount of heat needed to increase temperature of 1 gram. The other is a dietary unit
  7. 10. a branch of chemistry that relates to the energy that changes during a chemical reaction or phase change
  8. 11. The sum of internal energy and the product of pressure and volume. The equation is H = E + PV where H is enthalpy, E is internal energy, P is pressure, and V is volume
  9. 12. (q) Energy that is transferred from one object to another after a temperature change. It always flows from hot to cold
  10. 13. The measure of the heat being transferred from one object to another. The heat gained and the heat lost are equal