[Kate]

Hi. How do I know which substance, between CH₃CH₂OH (liquid) and CH₃OCH₃ (liquid) at the same conditions of pressure and temperature, has a higher value of entropy ?

My answer would be CH₃OCH₃ (liquid) since both have the same molar mass but CH₃OCH₃ has weaker intermolecular forces compared to CH₃CH₂OH.

Is this right ?

[JEE10]

The less organised the molecule, or the more disordered, the more is its entropy

Ethanol has intermolecular H-bonding, so we can expect it to be more organised than dimethyl ether. Hence it probably has less entropy than dimethyl ether

So I would say that you are correct

[Kate]

Thanks.

Another question: why does diamond have a higher value of entropy than graphite ?

[cliverlong]

Thanks.

Another question: why does diamond have a higher value of entropy than graphite ?

What values do you have?

Where do you get your data from?

Clive