Exothermic and Endothermic Reactions

The bag you made in class that felt cold afterwards was an example of an...

• Exothermic chemical reaction

• Endothermic chemical reaction

Tags

NGSS.MS-PS1-4

The energy released by exothermic reactions happens when...

• chemical bonds that release a lot of energy when they're formed are formed between atoms

• chemical bonds that require a lot of energy to break are broken

Tags

NGSS.HS-PS1-4

Exothermic reactions feel...

• Hot

• Cold

Tags

NGSS.HS-PS3-4

True or false: Exothermic reactions mostly absorb energy.

• True

• False

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

The bombardier beetle's hot spray is a result of an...

• Exothermic chemical reaction

• Endothermic chemical reaction

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

The energy absorbed by endothermic reactions is used to...

• form chemical bonds between atoms that release a lot of energy when they're formed

• break chemical bonds that require a lot of energy to break

Tags

NGSS.MS-PS1-4

Cooking bacon as it absorbs heat and watching it change color and smell is a good example of an...

• Exothermic chemical reaction

• Endothermic chemical reaction

Tags

NGSS.MS-PS1-2

Endothermic reactions feel...

• Hot

• Cold

Tags

NGSS.MS-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?

• It is an exothermic reaction

• It is an endothermic reaction

Tags

NGSS.MS-PS1-4

HCl reacts with Zn giving off heat

• endothermic

• exothermic

Tags

NGSS.HS-PS1-4