
(a)
Interpretation:
The heat is absorbed or released when
Concept Introduction:
Endothermic Reactions:
The endothermic process is a term that describes a reaction where the system absorbs the energy from its surrounding in the form of heat. Few examples of endothermic process is photosynthesis, evaporating liquids, melting ice.
Exothermic reaction:
The exothermic reaction is the opposite of an endothermic reaction. It releases energy by light or heat to its surrounding. Few examples are neutralization, burning a substance, reactions of fuels, deposition of dry ice, respiration.
(b)
Interpretation:
The heat is absorbed or released when freezing of
Concept Introduction:
Refer to part (a).
(c)
Interpretation:
The heat is absorbed or released when condensing
Concept Introduction:
Refer to part (a).
(d)
Interpretation:
The heat is absorbed or released when vaporizing
Concept Introduction:
Refer to part (a).

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Chapter 4 Solutions
Principles of General, Organic, Biological Chemistry
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