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Multiple Choice Quiz
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1

Energy is
A)neither created nor destroyed.
B)transferred between different forms.
C)transferred from place to place.
D)all of the above.
2

Which statement is true of work?
A)It is energy divided by acceleration.
B)It requires moving an object against the pull of a fundamental force.
C)It is the transfer of an object from one place to another.
D)It is kinetic energy.
3

A combustion reaction
A)normally requires oxygen.
B)requires a fuel.
C)gives off energy.
D)all of the above.
E)none of the above.
4

Temperature of a substance is
A)a measure of how much energy a substance has.
B)a measure of the average kinetic energy of its particles.
C)a measure of how much kinetic energy the particles have.
D)a measure of how much potential energy the particles have.
5

Which pair does not represent the same temperature?
A)373 Kelvins and 100 degrees Celsius
B)298 Kelvins and 25 degrees Celsius
C)248 Kelvins and -25 degrees Celsius
D)282 Kelvins and 13 degrees Celsius
6

Which of the following in not true of light?
A)It is the visible form of electromagnetic radiation.
B)It can be absorbed by chemicals, causing electrons to jump to higher energy levels.
C)It is a form of energy.
D)The visible region of light includes wavelengths from 300 nm to 900 nm.
7

Which of the following is true regarding endothermic and exothermic reactions?
A)A reaction which releases energy is exothermic.
B)A reaction which absorbs energy is endothermic.
C)In an exothermic reaction, heat is released.
D)In an endothermic reaction, heat is absorbed.
E)All of the above are true.
8

Since every chemical change involves a gain or loss of energy
A)energy is transferred from the chemicals into the surroundings.
B)energy from the surroundings is transferred into the chemicals.
C)energy is transferred either from the surroundings into the chemicals or from the chemicals to the surroundings.
D)energy is not transferred.
9

Why does hydrogen peroxide, H2O2, have such a high boiling point (152.2oC)?
A)Because it is such a small molecule.
B)Because it has such a low molecular weight.
C)Because the attractions among hydrogen peroxide molecules are strong.
D)Because the attractions of the bonds within hydrogen peroxide molecules are strong.
E)Because the molecule decomposes to form water and oxygen.
10

Which of the following is a characteristic of bond energy?
A)Bond breaking is an endothermic process.
B)Bond making is an exothermic process.
C)Bond breaking requires energy.
D)Bond making releases energy.
E)All of the above are true.
11

Using bond energies, calculate the energy change associated with the combustion of 1 mole of methane according to this reaction: CH4 + O2 -> CO2 + H2O.
A)-988 kJ
B)-2647 kJ
C)-803 kJ
D)-1660 kJ
12

Using bond energies, calculate the energy change associated with the combustion of 2 moles of ethane according to this reaction: C2H6 + O2 -> CO2 + H2O.
A)-10090 kJ
B)-2835 kJ
C)-3455 kJ
D)-1869 kJ
13

Entropy is a measure of the
A)energy of the particles.
B)disorder of the particles.
C)order of the particles.
D)compactness of the particles.
14

The entropy of a system and its surroundings increases when a spontaneous process happens. This is described by
A)the 1st law of thermodynamics.
B)the 2nd law of thermodynamics.
C)the 3rd law of thermodynamics.
D)the law of conservation of matter.
15

Identify the following that is a spontaneous process.
A)Ice melting at room temperature.
B)An iron nail rusting.
C)Water evaporating at room temperature.
D)All of the above.
16

Which of the following reactions has an increase in entropy?
A)2H2 (g) + O2 (g) -> 2H2O (g)
B)H2O (g) -> H2O (l)
C)2CO (g) + O2 (g) -> 2CO2 (g)
D)N2 (g) + 3H2 (g) -> 2NH3 (g)
E)None of the above
17

Reactions that result in the increased dispersal of matter and energy are said to be _____ reactions.
A)entropic
B)spontaneous
C)endothermic
D)kinetic
18

The entropy of the universe is
A)decreasing.
B)increasing.
C)never changing.
D)in constant flux but remains constant.
19

Which of the following statements is not true of a catalyst?
A)It increases the rate of a reaction.
B)It is not used up in the reaction.
C)It decreases the rate of a reaction.
D)It may change temporarily during the reaction but returns to its original state.
20

Select the correct rank order of increasing energy per photon.
A)orange<IR<UV<blue
B)UV<IR<blue<orange
C)IR<orange<blue<UV
D)UV<blue<orange<IR
E)IR<blue<orange<UV





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