some question

[Dencology]

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which is temp dependent: molality or malarity

also, how does a small specific heat, c, will indeed yield a large delta T

delta H = mc delta T

 

[osimsDDS]

which is temp dependent: molality or malarity

also, how does a small specific heat, c, will indeed yield a large delta T

delta H = mc delta T

For the first question: molarity is temperature dependent and molality is not...

Second question: its just like pv=nrt where p and v are inveresely related, the same goes here...a small specific heat (c) will give you a large T to counter balance the affect...

 

[Dencology]

thanks

 

[Glycogen]

which is temp dependent: molality or malarity

also, how does a small specific heat, c, will indeed yield a large delta T

delta H = mc delta T

Malarity will be tem dependent b/c only molarity is dealing with Volume,molality in the other hand is mole/kg and so it is not involved with volume so tem has no affect on it.
For specific heat the reason is that when a compound is impure means has more ion in it ,it will boil faster hence,will have low specific heat and will boil in shorter time and that will cause a large delta T.ex: an impure substance might boil from 10c to 100c and will have delta T of 90c very fast whereas for example water which is pure substance and will take longer time to boil and has large specific heat and so will have smaller delta T.

 

[DRHOYA]

Molality is independent of temperature. Take a look at the freezing/boiling point depression/elevation equations. In the second question, like the others said, look at the q=(m)(c)(delta T) equation. Pending that (q) and (m) remains the same......if you decrease (c)....then delta T will have to increase to suffice. Hope that helps. man.