Energy in Chemical Reactions

What type of reaction is shown in the photo?

• Exothermic
• Isothermic
• Endothermic
• None of the  above

Tags

NGSS.HS-PS1-4

How does an exothermic reaction feel?

• cold
• warm
• You can't feel it
• None of the above

Tags

NGSS.HS-PS1-4

NGSS.HS-PS3-4

What tool is used to measure the amount of heat in a material?

• meter stick
• spring scale
• graduated cylinder
• thermometer

What are the reactants in the chemical equation below?
Na+Cl₂ →  2NaCl

• Na and Cl
• Na only
• NaCl
• 2NaCl

What are the products in the chemical equation pictured?

• CO₂
• CO₂ and H₂O
• CH₄ and O₂
• O₂

Tags

NGSS.MS-PS1-5

NGSS.MS-PS1-2

How do you know that energy is being absorbed during a chemical reaction?

• Temperature increases
• Temperature decreases

Tags

NGSS.HS-PS1-4

A process in which complex compounds break down into simpler EX: rotting leaves or an old log

• activation
• decomposition
• exothermic

Tags

NGSS.MS-LS2-3

Combustion is the fast reaction between ____and fuel

• oxygen
• products

Tags

NGSS.MS-PS1-5

Is photosynthesis an exothermic or endothermic reaction?

• Endothermic
• Exothermic

Tags

NGSS.HS-LS1-5

NGSS.HS-LS2-5

What happens to the bonds when 2 substances react

• They break so new bonds can form
• Nothing the bonds are too strong
• They change colour

Tags

NGSS.HS-PS1-4