Recall Quiz - rates and energy

In an endothermic reaction, heat is ...

• taken in or absorbed
• given out or released 

An exothermic reaction will make its environment feel

• warmer.

• cooler.

The graph above is from which type of reaction?

• Endothermic reaction

• Exothermic reaction

Have you ever eaten sherbet sweets candy? They fizz in your mouth and your tongue feels cold. Why do you think that is?

• It is an exothermic reaction
• It is an endothermic reaction
• It is made of ice
• It is dissolving your mouth

Is photosenthysis an Exothermic or an Endothermic reaction?

• Endothermic
• Exothermic

Sara is reacting sulfuric acid with magnesium ribbon, the reaction is exothermic. What preliminary measure she should take to identify it as exothermic reaction?

• she will use a pair of tongs

• she will use a thermometer to record temperature

• she will not record temperature

• none

What is the mass of H₂O in the reaction above?

• 70.01
• 24.11
• 21.44
• 48.22

What happens in a chemical reaction?

• Bonds between atoms break and/or are formed

• New atoms are created and/or removed

• Protons move from one atom to another

• Electrons change into protons

Breaking a chemical bond...

• requires energy

• releases energy

• is unrelated to energy

Forming a chemical bond...

• requires energy

• releases energy

• is unrelated to energy