What is the reason for energy changes in chemical reactions?
Correct answer: C. Bond formation and breakage
- A. Bond formation
- B. Bond breakage
- C. Bond formation and breakage
- D. Ionic bonds
Explanation
A. Bond formation: This option is correct because energy changes in chemical reactions often occur when new chemical bonds are formed. When new bonds are created, energy may be released, resulting in an exothermic reaction.
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About Chemical Equilibrium
Reversible reactions reach dynamic equilibrium when forward and reverse rates become equal, and Le Chatelier's principle predicts the effect of changing concentration, pressure or temperature. The chapter also covers solubility product, the common ion effect, buffer action and the conditions used in Haber's process, with equilibrium shifts distinguished from changes in the equilibrium constant.
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