## Why is entropy extensive?

Emily Glaser 1F
Posts: 156
Joined: Thu Jul 27, 2017 3:01 am

### Why is entropy extensive?

If q=mCT

and delta S = q/T, doesn't that involve mass (intensive)

Hannah Chew 2A
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### Re: Why is entropy extensive?

An extensive property is dependent on size (or mass), and like you said, entropy = q/T, and q in itself is dependent on the mass, so therefore, it is extensive. Mass is an extensive property.

An example of an intensive property would be density of water. No matter how much water you have, the density still remains the same.

Ya Gao
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### Re: Why is entropy extensive?

Entropy is a extensive property because it depends on the number of moles involved ( involves mass, size )

Kyle Alves 3K
Posts: 46
Joined: Thu Jul 27, 2017 3:01 am

### Re: Why is entropy extensive?

The easy way to remember is:
an extensive property is energy/temperature, only depends on amount of substance (heat capacity is in kJ/K which is like q/T)
an intensive property is energy/(temperature x amount), which is like kJ/(C x g) for specific heat or J/(K x mol) for heat capacity

Michael Downs 1L
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### Re: Why is entropy extensive?

This is very helpful

Rishi Khettry 1L
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Joined: Fri Sep 29, 2017 7:05 am

### Re: Why is entropy extensive?

Extensive is dependent while intensive is independent

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