Propanone,Boils at 68oC, at 150 kPa

Ethanol,Boils at 90oC, at

150 kPa

Water,Boils at

110oC, at 150 kPa

LOGIC: Propanone exerts 150 kPa at 68oC, while water must reach 110oC to yield the 150 kPa. That is due to the fact that water has STRONGER ATTRACTIONS to break, and that requires more energy, causing a higher boiling point.

Water,Boils at

100oC, at SP

SP Ethanol,Boils at 79oC,

at SP

Propanone,Boils at 55oC,

at SP

Ethanoic,Boils 119oC, at

SP

LOGIC: Propanone reaches SP at 55oC, while water must reach 100oC to yield the SP. That is due to the fact that water has STRONGER ATTRACTIONS to break, and that requires more energy, causing a higher normal (SP), sea level boiling point.

Water,Boils at

100oC, at SPSP Ethanol,

Boils at 79oC, at SP

Propanone,Boils at 55oC,

at SP

Ethanoic,Boils 121oC, at

SP

Propanone,Boils at 68oC, at 150 kPa

Ethanol,Boils at 90oC, at

150 kPa

Water,Boils at

110oC, at 150 kPa

Ethanoic

( 95

o , 47k

Pa)

Ethanol( 95o , 190 kPa)

Water( 95o , 80 kPa)

LOGIC: At a constant 95oC, ethanol is more volatile than water. Ethanol gives the relatively greatest vapor pressure, has the weakest attractions and lowest boiling point. Ethanoic acid is the least volatile and has the strongest attractions and highest boiling point ( we did not consider propanone at this temp).

These two are NOT generating enough vapor pressure at this temperature to boil at SP, both are below 101.3kPa(1atm)

Ethanol generates 190kPa at this temp, well above the 101.3 kPa needed at SP.101.3 kPa is applied to a liquid

at SP. The liquid must generate thet much vapor pressure to boil, this is the normal boiling point.

Ethanol (71o, 72 kPa)

Water (71o, 30 kPa)

Ethanoic acid (71o , 20 kPa)

Propanone (71o , 160 kPa)

1)Can propanone boil at 30oC if SP is applied.2)Which substance on table H has the weakest

attractions.3)Which substance is the most volatile on table H.4)Can propanone boil at sp if its temp is 75oC ?5)Can water boil at 700C if the atmospheric

pressure is SP?

U DO IT NOW1/24/07

1)Can propanone boil at 30oC if SP is

applied?The vapor pressure exerted by propanone at 300C is about 39 kPa, far below the 101.3 kPa required at SP.It cannot boil at 30 C under SP.

4) Can propanone boil at sp if its temp

is 75oC ?

The vapor pressure exerted by propanone at 750C is about 180 kPa, far above the 101.3 kPa required at SP.It will boil.

5) Can water boil at 700C if the atmospheric pressure is SP?

The vapor pressure exerted by water at 700C is about 30 kPa, far below the 101.3 kPa required at SP.It will not boil.