Page 1 of 1

### Intensive vs Extensive

Posted: Sun Feb 09, 2020 4:31 pm
What does it mean when properties are intensive vs extensive? For example, what makes entropy extensive?

### Re: Intensive vs Extensive

Posted: Sun Feb 09, 2020 5:00 pm
Extensive properties depend on the sample size, such as mass and volume. Intensive properties, on the other hand, do not depend on the quantity of the sample we are looking at, such as the melting point of a sample. Samples with extensive properties can be calculated by subtracting the final amount of the sample by the initial amount. Entropy is, therefore, an example of a sample with extensive properties.

### Re: Intensive vs Extensive

Posted: Sun Feb 09, 2020 5:46 pm
Intensive properties are more informative, since they are always the same for a certain substance (density), whereas extensive properties can be different for the same substance (you can have different volumes or masses of one substance)

### Re: Intensive vs Extensive

Posted: Sun Feb 09, 2020 6:25 pm
I believe that extensive properties depend on how much of a sample you have, while intensive properties don't really depend on quantity of the sample or the size of the sample, etc.

### Re: Intensive vs Extensive

Posted: Sun Feb 09, 2020 6:46 pm
Intensive properties are properties independent of the quantity of the substance. One example is specific heat capacity since it is specified/normalized to 1 gram of a substance. Extensive properties do depend on the amount of a substance, like heat capacity.

### Re: Intensive vs Extensive

Posted: Sun Feb 09, 2020 6:48 pm
for an intensive property, the value of something will be the same no matter how much of a substance you have (ie, specific heat). for an extensive property, the value of something depends on how much substance you have (ie heat capacity)

### Re: Intensive vs Extensive

Posted: Sun Feb 09, 2020 7:14 pm
An intensive property is a property in which the amount of material in a system does not affect its value or quantity. For an extensive property, however, the amount of material in a system does affect its value

### Re: Intensive vs Extensive

Posted: Sun Feb 09, 2020 7:20 pm
Entropy is an extensive property because it depends on the quantity of each. For example, if you have a 6 atom molecule and a 3 atom molecule, the 6 atom molecule has a higher entropy since it can occupy more states than the latter. So in this case, since the entropy of the two molecules was dependent on the amount of atoms there were in each molecule, entropy is an extensive property.