Heating Curves & Energy Pathway Diagrams

This reaction is...

• Endothermic

• Exothermic

This reaction is...

• Endothermic

• Exothermic

In an endothermic reaction, energy is _______ and the surroundings get _______.

• Absorbed, hotter

• Absorbed, colder

• Released, hotter

• Released, colder

In an exothermic reaction, energy is _______ and the surroundings get _______.

• Absorbed, hotter

• Absorbed, colder

• Released, hotter

• Released, colder

This is an example of a(n)...

• Energy diagram

• Reaction pathway diagram

• Heating curve

• Cooling curve

Sections A, C, and E represent....

• States of matter

• Phase changes

Sections B and D represent....

• States of matter

• Phase changes

What is occurring at section D?

• Melting/freezing

• Melting/condensing

• Vaporizing/freezing

• Vaporizing/condensing

What is occurring at section B?

• Melting/freezing

• Melting/condensing

• Vaporizing/freezing

• Vaporizing/condensing

During phase changes, temperature...

• Increases

• Decreases

• Remains constant