2 replies to this topic

[DANA-IF]

Hello friends , 

 

I'm wondering please why  hysys don't show  the molecular weight unit .

 

As we know the MW should be in g*mol-1

 

Thanks !

[Profe]

Hi Dana-If

 

For your best understanding, look at Wikipedia: Relative atomic mass and Molar Mass.

 

But in HYSYS the units of Molar Mass depends of your working units.

 

Good luck

Fausto

Edited by Profe, 17 May 2016 - 10:54 AM.

[Bobby Strain]

"The molecular weight of a substance is the weight in atomic mass units of all the atoms in a given formula.

An atomic mass unit is defined as 1/12 the weight of the carbon-12 isotope. The old symbol was amu, while the most correct symbol is u (a lower case letter u). By the way, carbon-12 is defined as weighing exactly 12 amu. This is the starting point for how much an atom weighs. For example, if you weigh 1/2 as much as C-12, you weigh 6. If you weigh twice as much, you weigh 24.

The molecular weight of a substance is needed to tell us how many grams are in one mole of that substance.

The mole is the standard method in chemistry for communicating how much of a substance is present.

You should have a periodic table for looking up atomic weights and a calculator."

 

Bobby