Chem 2: Vapor Pressure, Boiling Point & Intermolecular forces?

At 187°C the vapor pressure of antimony trichloride is 0.5 atm.

At 249°C the vapor pressure of antimony tribromide is 0.5 atm.

Predict the answers to all of the following questions by selecting the correct molecular substance in each case.

Which substance exhibits weaker attractive intermolecular forces?

***SbCl3 ...weaker because it acheives the same vapor pressure at a lower temp

SbBr3

Which substance has the lower normal boiling point?

SbBr3

**SbCl3 its got a head start at 0.5 atm

Which substance will evaporate more slowly at 210°C?

SbCl3

SbBr3 .....this one its vapor pressure <0.5 but choride >0.5

Which substance has the lower vapor pressure at 180°C?

SbBr3 ...this one it will come down way less than 0.5 atm

SbCl3

My Answers:

SbCl3

SbCl3

SbCl3...think wrong At 187°C the vapor pressure of antimony trichloride is 0.5 atm.

At 249°C the vapor pressure of antimony tribromide is 0.5 atm. think about it at 180C choride vapor pressure will be slighlty less than 0.5 atm BUT bromine will drop like a rock becaue you are now 100C less than the vapro pressure at 0.5 atm

SbBr3

A. A low warmth of vaporization shows that this is incredibly straight forward to transform a liquid to a gas. If this is real, the intermolecular forces between the liquid atoms could desire to be susceptible.

Ok... while I think I get what you are meaning, we can offer you a more thorough answer if you write more information. Just add more and I will come back! ;p