Exothermic Vs. Endothermic

In an exothermic reaction, heat is ...

• taken in
• given out

Tags

NGSS.HS-PS1-4

What type of reaction occurs in a hand warmer

• exothermic
• endothermic

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

NGSS.HS-PS3-4

If they energy required to break the bonds is greater than the energy given out by making new bonds the reaction is

• Exothermic
• Endothermic
• Neutralisation

Tags

NGSS.HS-PS1-4

If they energy required to break the bonds is less than the energy given out by making new bonds the reaction is

• Exothermic
• Endothermic
• Neutralisation

Tags

NGSS.HS-PS1-4

Baking bread and cooking an egg are examples of....?

• Endothermic processes
• Exothermic processess
• None of these 

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

NGSS.MS-PS3-5

What type of reaction is shown in the photo?

• Exothermic
• Isothermic
• Endothermic
• None of the  above

Tags

NGSS.HS-PS1-4

What is true of this reaction?

• Equal amounts of energy were released and absorbed
• The reaction released more energy than it absorbed
• The reaction absorbed more energy than it released

Tags

NGSS.HS-PS1-4

What is true of the reaction described below?
Br₂ + Cl₂ + 30.0 J of energy  → 2BrCl

• It is exothermic because energy was released.
• It is endothermic because energy is absorbed.
• It is exothermic because energy is absorbed.
• It is endothermic because energy is released.

Tags

NGSS.HS-PS1-4

Sydnee mixes a solution of baking soda and water. The initial temperature of the solution is 22⁰C. She adds 10mL of vinegar and takes the temperature again. The final temperature is 17⁰C. Which of the following is true?

• The reaction is exothermic
• The reaction is endothermic
• ΔH is negative
• The reaction lost heat to the environment.

Tags

NGSS.HS-PS1-4

NGSS.HS-PS3-4