Bell Ringer

Refer to the diagram labeled 'Universe = System + Surroundings'. Which part of the diagram represents the 'System'?

• A) The flask and its contents

• B) The contents inside the flask only

• C) The room outside the flask

• D) The entire box

What is an endothermic reaction?

• Heat flows out of a system to its surroundings

• Heat flows into a system from its surroundings

• The system loses heat

• The surroundings gain heat

Tags

NGSS.HS-PS3-1

NGSS.HS-PS3-4

In an endothermic reaction, reactions absorb energy and are defined as positive (+q).

• True

• False

Tags

NGSS.HS-PS1-4

Which of the following is true about exothermic reactions?

• They are defined as positive (+q)

• The system gains heat

• The system loses heat

• The surroundings get cooler

Tags

NGSS.HS-PS3-4

Fill in the blank: Exothermic reactions are chemical reactions that ________ heat to the environment.

Tags

NGSS.HS-PS1-4

In an endothermic reaction, heat is ...

• taken in or absorbed

• given out or released 

Tags

NGSS.HS-PS1-4

NGSS.HS-PS3-1

NGSS.HS-PS3-4

In an endothermic reaction, heat is...

• taken in or absorbed

• given out or released

Tags

NGSS.HS-PS1-4

Which of the following best describes an exothermic reaction?

• The system gains energy

• Heat is released into the surroundings

• Heat is absorbed from the surroundings

• The surroundings lose energy

Tags

NGSS.HS-PS1-4

What happens to the temperature of the surroundings during an endothermic reaction?

• The temperature fluctuates

• The temperature remains constant

• The temperature decreases

• The temperature increases

Tags

NGSS.HS-PS1-4

In thermodynamics, what is the term used to describe the part of the universe being studied?

• Universe

• System

• Environment

• Surroundings