
(a)
Interpretation:
Freezing water has to be classified as an endothermic or exothermic reaction.
Concept Introduction:
Exothermic reaction: Those reactions that release heat energy to the surroundings are called as exothermic reactions. The formation of
Endothermic reaction: Those reactions that absorb heat energy from the surroundings are called as endothermic reactions. The breakage of chemical bonds absorbs heat energy.
(b)
Interpretation:
The reaction inside an ice pack has to be classified as an endothermic or exothermic reaction.
Concept Introduction:
Refer to part (a).
(c)
Interpretation:
Burning of wood has to be classified as an endothermic or exothermic reaction.
Concept Introduction:
Refer to part (a).
(d)
Interpretation:
Combustion of magnesium in dry ice has to be classified as an endothermic or exothermic reaction.
Concept Introduction:
Refer to part (a).
(e)
Interpretation:
Melting of ice has to be classified as an endothermic or exothermic reaction.
Concept Introduction:
Refer to part (a).

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Chapter 8 Solutions
FOUND.OF COLLEGE CHEMISTRY
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