Quiz 6 Energy and States of Matter

Karen Timberlake

Answer the questions below and then click "submit" to send your answers.

  1. Potential energy is energy that

    2. Your answer:
    is stored.
    is found in the chemical bonds of food
    can be converted to kinetic energy
    all of the above

  2. The temperature of 85oF on the Celsius temperature scale is

    3. Your answer:
    29 oC
    47 oC
    53 oC
    67 oC

  3. On the Fahrenheit scale, the temperature of -5oCelsius is

    4. Your answer:
    -9 oF
    23 oF
    27 oF
    41 oF

  4. One kilocalorie is

    5. Your answer:
    1000 calories
    the same as a nutritional Calorie
    a unit of heat
    all of the above

  5. The specific heat of aluminum is 0.22 cal/goC. The number of calories required to heat 25 g of aluminum from 12oC to 28oC is

    6. Your answer:
    42 calories
    400 calories
    88 calories
    150 calories

  6. The number of kcal released when 85g of water cools from 92oC to 32oC is

    7. Your answer:
    7.8 kcal
    2.7 kcal
    21 kcal
    5.1 kcal

  7. How many joules are required to heat 12 g of water from 4oC to 68oC?

    8. Your answer:
    820 J
    3400 J
    3200 J
    200 J

  8. How many kilocalories are obtained from one serving of chips ( about 12 chips) if one serving contains 7 g of fat, 18 g of carbohydrate, and 2 g of protein?

    9. Your answer:
    140 kcal
    240 kcal
    60 kcal
    80 kcal

  9. At 0oC, the calories needed to freeze 120 g of water is

    10. Your answer:
    9600 cal
    0 cal
    120 cal
    1.5 cal

  10. The rate of a reaction can be increased by

    11. Your answer:
    decreasing the temperature
    using less reactant
    using a catalyst
    all of the above

  11. A reaction is exothermic if

    12. Your answer:
    the energy level of the products is higher than that of the reactants
    energy is released
    increasing the temperature shifts the reaction to the products
    all of the above

  12. Consider the reaction H2 + Cl2 = 2HCl + 44 kcal Which of the following will shift the equilibrium towards the products?

    13. Your answer:
    add H2
    remove Cl2
    add HCl
    increase the temperature

  13. Consider the reaction H2 + Cl2 = 2HCl + 44 kcal Which of the following will shift the equilibrium towards the reactants?

    14. Your answer:
    remove HCl
    lower the temperature
    remove Cl2
    add H2

  14. A sample of 15 g of water at 68oC is heated to 100oC and converted to gas. The number of calories required is

    15. Your answer:
    9600 cal
    8100 cal
    8600 cal
    480 cal

  15. Consider the reaction PCl5 + 16 kcal = PCl3 + Cl2.

    16. Your answer:
    The reaction is endothermic.
    The equilibrium will shift to products when heat is added.
    The equilibrium will shift to reactants if Cl2 is added.
    All of the above

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