8. Thermochemistry

Nature of Energy

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Where is chemical energy stored in a molecule?
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As the molecular motion of a substance increases, which of the following changes occurs?
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Which branch of chemistry is primarily concerned with the study of energy changes during chemical reactions?
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Which statement best describes the relationship between metallic bond strength and the enthalpy of vaporization of a metal?
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Do all materials respond to heat in the same way? Which of the following examples best supports your answer?
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Which of the following best describes how the total reaction energy (enthalpy change) is calculated for a chemical reaction?
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An energy efficient refrigerator uses 780 kWh of electrical energy per year. How many kilocalories of electricity does it use in three years?
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Which of the following occurs every time energy changes form?
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Which process is primarily responsible for the release of chemical potential energy in a substance?
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Which type of energy is commonly required to initiate a decomposition reaction?
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When the process of condensation occurs, the kinetic energy of particles:
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As water is heated, what happens to the molecules in the water?
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Which of the following energy sources does not produce carbon dioxide when generating electricity?
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When an atom absorbs energy, which of the following occurs?
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In the photosynthesis equation 6 CO_2 + 6 H_2O ightarrow C_6H_{12}O_6 + 6 O_2, which is the main source of energy driving the reaction?
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