Chem test 3

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Author:
moses1424
ID:
94731
Filename:
Chem test 3
Updated:
2011-07-20 21:57:36
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Chem test
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Chem test 3
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  1. Equilibrium Constants
    • Kc = Products/Reactants
    • write the coeeficient of each reactant as an exponant.
  2. Effect of Adding Reactant
    Increase in the number of collisions.

    • The effect of adding reactant shifts the equilibrium
    • toward the products

    • The rate of the forward reaction increases to form
    • more HF product such that equilibrium concentrations are equal to Kc again.
  3. Effect of Adding Product
    • RAte of reverse reaction increases.
    • Shifts Equilibium towrards the reactants.
  4. Effect of removing reactant?
    • Decreases rate of forward reaction.
    • Shifts equilibrium towards reactants.
  5. Effect of removing Product
    • Decreases the rate of reverse reaction.
    • Pushes equilibrium towards products.
  6. Decrease in volume
    equlibrium shifts towards the fewer number of moles.
  7. Volume increase
    Shifts reaction equilibrium towards the greater number of moles.
  8. Exothermic reaction heat added
    shift towards the reactants
  9. Exothermic heat taken away
    shifts towards products
  10. Endothermic HEat added
    Shifts to products
  11. Endothermic heat loss
    Shifts towards the reactant
  12. Isotopes with numbers over 84 are radioactive because?
    Too many protons in one place make it unstable.
  13. Alpha Particles
    • a helium nucleus,2 protons and 2 neutrons, a
    • mass number of 4 and a charge of 2+
    • a low energy compared to other radiation particles
    • travels through air 2-4 cm
    • .05 tissue penetration depth
    • Shielding paper or clothing.
    • Radium 226
  14. Beta Particle
    • particle is a high-energy electron
    • has a mass number of 0 and a charge of 1-
    • 200-300 cm through air.
    • 4-5 mm tissue depth
    • Shielding heavy clothing gloves lab coat
    • Carbon 14
  15. Gamma Particle
    • Has a mass number of 0 and a charge of 0.
    • Is emitted from an unstable nucleus to give a more stable, lower energy nucleus.
    • 500m through the air
    • 50 cm or more penetration
    • shielding lead or thick concrete
    • Thechnetium 99m
  16. Radiation sickness
    • is not detected under 25 rem
    • involves a decrease in white blood cells at 100 rem
    • includes nausea and fatigue over 100 rem
    • reduces white-cell count to zero over 300 rem and leads to death in 50% of people at 500 rem
  17. Fusion
    • 2 atoms form 1
    • Very high Heat
    • Sun and Stars
  18. fission
    • Splitting of atom
    • Very High Energy
    • Nuclear power plants

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