Extensive and Intensive Physical Properties

​Extensive vs. Intensive Properties

​Unit 1: Matter

​Matter

​So far, we have started to split matter up into different categories. This was either based on their properties (chemical or physical) or the changes that they can undergo (chemical or physical).

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​Chemical Properties - these properties indicate how a substance will react with something else. This matter is changed into a new substance after a chemical reaction.

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​Physical Properties - properties that can be observed with the senses without destroying matter.

Open Ended

Give 3 examples of a CHEMICAL property.

Open Ended

Give 3 examples of a PHYSICAL property.

​For today's lesson, we are talking about 2 categories of PHYSICAL properties.

​Let's think about what those were...

Open Ended

List as many physical properties as you can!

​Here they are!

temperature

density

​boiling/melting point

​color

​luster

​hardness

​ductility

​conductivity

​malleability

​heat

​mass

​volume

​size

​weight

​length

​New Terms You Probably haven't seen:

​hardness - the ability of material to resist deformation

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​ductility - the ability of a material to have its shape changed

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​luster - to be shiny or reflective

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​malleability - can be hammered into thin sheets

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​conductivity - ability to conduct heat or electricity

​Extensive Properties

​These are physical properties that are DEPENDENT on the amount of substance that is present.

​

​So, the more of that substance that I have, the higher that physical property's value!

​Intensive Properties

​These are properties that are INDEPENDENT of the amount of substance that is present.

​

​So, it doesn't matter how much of that substance I have. The value for its physical properties will ALWAYS be the same.

Open Ended

Which properties do you think are INTENSIVE. (List at least 3)

Open Ended

Which properties do you think are extensive? (List at least 3)

​Extensive Properties

• ​heat

• ​mass

• ​volume

• ​size

• ​weight

• ​length

​Intensive Properties

• temperature

• boiling/melting point

• color

• odor

• luster

• hardness

• ductility

• malleability​

Poll

Is there a difference between temperature and heat?

• YES!

• NO!

• Aren't they the same thing???

​Temperature

​Temperature describes the average kinetic energy of molecules within a system. (measures in degrees F ,or C, or K (kelvin))

​

​For example ice...

​Water freezes at 0 degrees C, no matter how much there is...

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​So, temperature is an intensive property!

​Heat

​Heat describes the transfer of energy between molecules within a system and is measured in Joules (J).

​In this case we can talk about boiling water...

​It would on take 5-10 minutes to boil a small pot of water but, it would take way longer to boil GALLONS of water.

​

​The amount of heat energy needed to boil the water is DEPENDENT on the amount of water present. So, heat is an extensive property!

​Density

​Density is a term that people often use to describe whether something will sink or float.

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​The formula for density is:

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​We can look at water for example. Its density is 1.0 g/mL. It doesn't matter if I have 10 gallons or 2 mL of water. Its density will always be 1.0 g/mL.

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​Do you think this is an extensive or intensive property??

Make sure that you keep these slides or take down some notes! :)​

Exit Ticket​

use your notes and the material from these slides to help you answer the following questions for your exit ticket!​

Multiple Choice

Which of the following terms matches this definition: A substance's mass divided by its volume.

• Density

• Volume

• Weight

• Mass

Multiple Choice

Which physical properties DO depend on the amount of matter that is present?

• Intensive Properties

• Extensive Properties

Fill in the Blank

Fill in the blank. Temperature is an ___________ property because the amount of matter present will not change its value.

Multiple Choice

Which physical properties DO NOT depend on the amount of matter that is present?

• Extensive Properties

• Intensive Properties

Poll

Are we ready for the QUIZ next week???

• YES!

• Meh...

• I need to study...

• NO! :/