Why is molality temperature independent?

[monsieurwise]

Is it because it's over kg, which is mass and does not depend on temperature? If so, molarity is temperature dependent right?
Thanks guys!!!

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[bluemoon27]

ask chad. i just did a google search which seems to say molarity is temp dependant whereas molality is not. i dont quite understand the reasoning however.

 

[Illfavor]

Is it because it's over kg, which is mass and does not depend on temperature? If so, molarity is temperature dependent right?
Thanks guys!!!

Exactly. Mass is independent of temperature, therefore so is molality. Volume is temperature dependent, and so is molarity.

 

[ktran17]

Look at the units. moles / kg

Both units are independent of temperature

Compare that to molarity : moles / L
Volume is dependent on temperature because it can change the volume of the solution..

 

[monsieurwise]

Sweet! Thanks everyone =)

 

[drechie]

question - i thought the mole fraction of a solution would change with temperature because i thought Keq changes with temperature. My EK Bio 1001 book said that mole fraction doesn't change with temperature. can someone help (please quote me so i get notified )