Exam Review: Thermochemistry

What type of reaction is this?

• Endothermic

• Exothermic

• Allergic

What type of reaction is this?

• Endothermic

• Exothermic

• Allergic

How does heat move?

• From cold to hot

• From hot to cold

What is chemical potential energy?

• Energy from chemicals

• Energy to make chemicals

• Energy stored in chemical bonds

• Energy from the sky

Releasing heat into the surroundings occurs during an ___________________ reaction.

• Exothermic

• Endothermic

• Kinetic Energy

• Thermal Energy

What are chemical reactions that absorb energy?

• endothermic

• fast

• slow

• exothermic

Consider the reaction: 2 H₂O + energy --> 2H₂ + O₂

• exothermic because releasing energy

• exothermic because absorbing energy

• endothermic because absorbing energy

• endothermic because releasing energy

Durning a phase change the temperature of a substance_________.

• always increases
• always decreases
• always stays the same
• varies

A reaction is performed in a beaker with a temperature probe recording the temperature changes of the reaction.  If the temperature began at 15.0 degrees Celsius and ended at 27.5 degrees Celsius. Is the reaction endothermic or exothermic?

• Exothermic
• Endothermic

In an exothermic reaction, heat is ...

• taken in
• given out