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LCC Chem exam 2 Test

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of 23 available terms

5 Written Questions

5 Matching Questions

  1. Kinetic Molecular Theory for Gases
  2. System
  3. STP
  4. Electrolyte
  5. Hydration
  1. a Standard Temperature and Pressure. 273 Kelvin (0 Celsius), 1 atmosphere (760 torr, 760 kPA).
  2. b Substance that dissolves in water. Conducts electricity
  3. c Interaction of water and it's solute particles
  4. d Portion of the universe under investigation
  5. e 1. Gas molecules move randomly in a linear fashion.
    2. Volume occupied by molecules is negligible.
    3. The attractive forces molecules are negligible.
    4. The time during which a collision occurs is very short compared to the time btn collissions.
    5. The avg. KE of molecules is directly proportional to the Kelvin temperature.

5 Multiple Choice Questions

  1. 1. Water soluble salts are strong electrolytes
    2. Almost all molecular compounds are non-electrolytes EXCEPT Strong acids
    3. Strong acids are strong electrolytes (6).
    4. Group 1a and 2a hydroxides are strong bases therefore strong electrolytes.
  2. Enthalpy change that occurs when 1mole of a substance is formed from its elements in their most stable state at 25'C and 1atm.
  3. Energy is neither created nor destroyed in a chemical reaction.
  4. Oxygen, Iodine, Chlorine, Nitrogen, Hydrogen, Fluorine, Bromine
  5. Amount of heat required to raise the temp. of an object by exactly 1'C.

5 True/False Questions

  1. Dalton's Law of Partial PressureIf a reaction can be carried out in a serious of steps, the change in energy for the overall reaction is the sum of the change of energy of the individual steps.

          

  2. EndothermicHeat flow from surroundings into the system. (q=+#)

          

  3. EffusionProcess where a gas escapes through a hole in its container into a vacuum.

          

  4. Exothermicheat flow from system out to surroundings.
    (q= - #)

          

  5. CalorimeterSubstance that dissolves in water. Conducts electricity