Laws of Thermodynamics

The First Law of Thermodynamics states...

• energy can't be created or destroyed.

• energy is always created.

• energy is always destroyed.

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NGSS.HS-PS3-2

NGSS.HS-PS1-4

The Second Law of Thermodynamics states...

• whenever there is an opportunity for energy dispersal, the energy spreads out.

• the energy disappears.

• the energy stays in place.

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NGSS.HS-PS3-4

Entropy is....

• a measure of energy dispersal, "chaos".

• when the energy disappears.

• when the energy is created.

When you put ice into iced tea, the ice cubes melt. This is an example of...

• high entropy (the thermal energy is spread out).

• low entropy (the thermal energy is concentrated in one place).

Tags

NGSS.HS-PS3-4

NGSS.HS-PS3-2

You buy McDonald's french fries and they start to get cold as you walk back to school. This is an example of...

• high entropy (the thermal energy is spread out).

• low entropy (the thermal energy is concentrated in one place).

Tags

NGSS.HS-PS3-4

Mrs. MacDonald puts water in ice cube trays to make ice cubes. As the water freezes, this is an example of...

• high entropy (the thermal energy is spread out).

• low entropy (the thermal energy is concentrated in one place).

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

NGSS.MS-PS3-5

• Heat will be transferred from the sugar to the coffee to reach equilibrium.

• Heat will be transferred from the coffee to the sugar to reach equilibrium.

• The sugar is in equilibrium with the milk, based on the zeroth law of thermodynamics.

Tags

NGSS.HS-PS3-4