Unit 10 Quiz--Energy in Nuclear Reactions--Thurston High Chemistry

Multiple Choice (Choose the best answer.)

  1. Rank the following types of reactions in order of increasing energy.

    chemical reactions < nuclear fission < phase changes < nuclear fusion

    phase changes < chemical reactions < nuclear fission < nuclear fusion

    chemical reactions < phase changes < nuclear fission < nuclear fusion

    nuclear fission < nuclear fusion < chemical reactions < phase changes

    nuclear fusion < nuclear fission< chemical reactions < phase changes

  2. In nuclear reactions,

    mass is conserved.

    the mass of the products is greater than the mass of the reactants.

    the mass of the reactants is greater than the mass of the products.

    mass is changed to energy.

    More than one of the above are correct.

    Use the reactions below to answer questions 3 - 7.

    I.

    		 
    + +

    II.

    		  + + + 3

    III.

    		 
    U (s) + 3F2 (g) UF6 (l)

    IV.

    		 
    UF6 (l) UF6 (g)

  3. Which of the reactions above would likely involve the least amount of energy per mole of reactant?

    I.

    II.

    III.

    IV.

    It is impossible to tell.

  4. Which of the reactions above would likely involve the most amount of energy per mole of reactant?

    I.

    II.

    III.

    IV.

    It is impossible to tell.

  5. Which of the reactions is a fusion reaction?

    I.

    II.

    III.

    IV.

    It is impossible to tell.

  6. Which of the reactions is a fission reaction?

    I.

    II.

    III.

    IV.

    It is impossible to tell.

  7. Which of the reactions could result in a chain reaction?

    I.

    II.

    III.

    IV.

    It is impossible to tell.

  8. Use mass-energy relation, E = m c2, to calculate the amount of energy in Kilojoules that could be produced if 0.25 Kg were changed to energy. (c = 3.00 x 10 8 m/s)

    7.5 x 10 4 KJ

    7.5 x 10 7 KJ

    2.3 x 10 13 KJ

    2.3 x 10 16 KJ

    None of the above are correct.

  9. Use the mass-energy relation to determine what mass would have to disappear in order for 1,000,000 J of energy to be created.

    1 x 10 - 11 Kg

    3 x 10 -3 Kg

    300 Kg

    9 x 10 10 Kg

    None of the above are correct.

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