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2.4 Chemical Reactions & Enzymes Chemical reaction: a process that changes, or transforms one set of chemicals into another. ● Bonds are broken, new chemical bonds form ● Can occur quickly or slowly ● Involve changes in energy Review Biomolecules

2.4 Chemical Reactions & Enzymes...Chemical reaction: a process that changes, or ... 5 ways to tell if a chemical reaction has occurred: Emission of heat or light Gas is produced Color

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Page 1: 2.4 Chemical Reactions & Enzymes...Chemical reaction: a process that changes, or ... 5 ways to tell if a chemical reaction has occurred: Emission of heat or light Gas is produced Color

2.4 Chemical Reactions & Enzymes

Chemical reaction: a process that changes, or transforms one set of chemicals into another.

● Bonds are broken, new chemical bonds form

● Can occur quickly or slowly● Involve changes in energy

Review Biomolecules

Page 2: 2.4 Chemical Reactions & Enzymes...Chemical reaction: a process that changes, or ... 5 ways to tell if a chemical reaction has occurred: Emission of heat or light Gas is produced Color

Reactants: elements or compounds before a reaction takes place

Products: elements that are formed after a reaction takes place

Reactants Products

Page 3: 2.4 Chemical Reactions & Enzymes...Chemical reaction: a process that changes, or ... 5 ways to tell if a chemical reaction has occurred: Emission of heat or light Gas is produced Color

5 ways to tell if a chemical reaction has occurred:

● Emission of heat or light

● Gas is produced

● Color change observed

● Formation of a precipitate

● Odor is produced

Page 4: 2.4 Chemical Reactions & Enzymes...Chemical reaction: a process that changes, or ... 5 ways to tell if a chemical reaction has occurred: Emission of heat or light Gas is produced Color

Example Chemical or Physical? Evidence

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