Entropy increases from solid, liquid to gas. Why?

• Molecular disorder increases

• Molecular randomness decreases

• Molecules are more energetic

• Molecules are more reactive

Tags

NGSS.MS-PS1-4

Systems in nature tend to undergo changes toward

• lower energy and less disorder

• lower energy and more disorder

• higher energy and less disorder

• higher energy and more disorder

Tags

NGSS.HS-PS3-4

Given the change of phase:

CO₂(g) —> CO₂(s)

As CO₂(g) changes to CO₂(s), the entropy of the system

• decreases

• increases

• remains the same

What is a spontaneous process ?

• slow process

• fast process

• process that needs an external intervention to occur

• process that does not need external energy to occur / keep happening

In an exothermic reaction, heat is ...

• taken in or absorbed
• given out or released

Tags

NGSS.HS-PS1-4

In an endothermic reaction, heat is ...

• taken in or absorbed

• given out or released

Tags

NGSS.HS-PS1-4

Is cellular respiration an endothermic or an exothermic reaction?

• Endothermic

• Exothermic

Tags

NGSS.HS-LS1-7

Reaction of oxygen with hydrogen:

0_{2 (g)} + 2H_{2 ------>} 2H₂0 + Energy

• endothermic

• exothermic

Tags

NGSS.HS-PS1-4

Photosynthesis reaction:

6CO₂ + 6H₂0 + Energy ------> C₆ H₁₂ 0₆ + 6O₂

• endothermic reaction

• exothermic reaction

Tags

NGSS.HS-LS1-5

NGSS.HS-PS1-4

The __________ law of thermodynamics states that entropy is always increasing.

• first

• second

• third

Tags

NGSS.HS-PS3-4