Question

show what you know
in the boxes below, sketch out how each type of reaction would look on a graph. then label the reactants and the products and show the energy line.
endothermic
reaction pathway

exothermic
reaction pathway

Explanation:

Step1: Define endothermic graph rules

In an endothermic reaction, products have higher energy than reactants, with an activation energy peak between them.

1. Label the left dashed line Reactants (lower energy)
2. Label the right dashed line Products (higher energy)
3. Draw a curved line from reactants, rising to a peak (activation energy), then falling to products.

Step2: Define exothermic graph rules

In an exothermic reaction, products have lower energy than reactants, with an activation energy peak between them.

1. Label the left dashed line Reactants (higher energy)
2. Label the middle dashed line Products (lower energy)
3. Draw a curved line from reactants, rising to a peak (activation energy), then falling to products.

Answer:

Endothermic Graph:

• Left dashed line: Reactants (lower energy)
• Right dashed line: Products (higher energy)
• Reaction line: Curved line starting at reactants, rising to a sharp peak (activation energy), then sloping down to products.

Exothermic Graph:

• Left dashed line: Reactants (higher energy)
• Middle dashed line: Products (lower energy)
• Reaction line: Curved line starting at reactants, rising to a sharp peak (activation energy), then sloping down to products.