Rate of Reaction Exothermic and Endothermic Reaction

What term is given to a reaction which transfers heat energy to the surroundings?

• Endothermic

• Reversible

• Exothermic

• Exotermic

Tags

NGSS.HS-PS1-4

When barium hydroxide and ammonium chloride react, the temperature of the mixture decreases. What kind of reaction is this?

• Endothermic

• Decomposition

• Exothermic

• Indothermic

Tags

NGSS.HS-PS1-4

NGSS.HS-PS3-4

When calcium reacts with water, the temperature changes from 18°C to 39°C. Which statement is correct?

• The solution at the end is acidic

• The reaction is reversible

• The reaction is exothermic

• The reaction is endothermic

Tags

NGSS.HS-PS1-4

NGSS.HS-PS3-4

A catalyst works by

• changing the order of the reaction
• increasing the temperature
• lowering the activation energy
• making the activated complex

How much activation energy is needed for this reaction?

• 300 KJ

• 500 KJ

• 400 KJ

• 100 KJ

Tags

NGSS.HS-PS1-4

What type of reaction is this?

• Exothermic

• Endothermic

• Energy Producing

• No way to tell

Tags

NGSS.HS-PS1-4

A student mixed two chemicals to allow them to react. The temperature before the reaction was 25 ° C. The temperature after the reaction was 18° C. Which of the following is true? 

• The temperature changed 
• It is an endothermic reaction
• It is an exothermic reaction 
• Two of the answers are correct 

Tags

NGSS.HS-PS1-4

NGSS.HS-PS1-5

In an endothermic reaction, heat is ...

• taken in or absorbed
• given out or released 

Tags

NGSS.HS-PS1-4

_____ reactions usually feel hot!

• endothermic

• exothermic

Tags

NGSS.HS-PS1-4

NGSS.HS-PS3-4

Which factors increase the rate of a reaction.

• increasing temperature
• increasing concentration
• increasing surface area
• all of these

Tags

NGSS.HS-PS1-5