Gen Chem. Quick Question

[letsgfuad]

Advertisement - Members don't see this ad

Does the addition of impurities LOWER the boiling point and melting point?

And im pretty sure addition of impurities lowers the freezing point correct?

 

[Arsenalista]

I think that impurities lower freezing/boiling point and raise freezing point. They interfere with the desired task. 👍

 

[RockstarDMD]

I think that impurities lower freezing/boiling point and raise freezing point. They interfere with the desired task. 👍

No, No....An impure compound will result in an increase in boiling point, and for melting point a decrease will result. 😀

 

[howui3]

No, No....An impure compound will result in an increase in boiling point, and for melting point a decrease will result. 😀

that's right!

think of this:

-when you add salt to your water when you are boiling pasta, you are trying to cook the pasta faster, since you are increasing the boiling point of water to above 100*C. The more impurities you add the higher the boiling point will be. That's why it's called boiling point elevation.

-then think of the coolant in your car. because of all the extra impurities/additives it does not freeze at 0*C, and you car can continue working in cold temperatures. The more impurities you add the lower the freezing point will be. That's why it's called a freezing point depression.

 

[L8DYV]

sounds pretty on the dot to me!