Vapour pressure

The following diagram shows vapour pressure curves for CH3F,CH3OH,CH3COOH,H2CO.

Match the curve with corresponding compound

16 Answers

24
eureka123 ·

IS anyone trying?

1
▬●๋•kể álwáýک● ·

1 = CH3F,
2 = CH3OH,
3 = HCOH,
4 = CH3COOH.......................due 2 deir b.p. (as v.p. depends inversly on b.p.)

1
skygirl ·

well so u remember the b.p. of all compounds ???? do you ??

1
skygirl ·

it can be thot of in terms of volatility.

more volatility ... more vap pressure..

intermolecular H- bonding inversely proportional to volatility..

now here, H-bonding extension --- CH3F > CH3OH > CH3COOH > H2CO.

also, volatility increases with temp ... H-bonds break..

sooooo,,,, 4- CH3F
3- CH3OH
2-CH3COOH
1- HCHO

the one most volatile will have considerable vep pressure at lower temp.

note that, the vap pressure curve here is same for all,,,, jus some attains it at lower temp, other at higher temp n so on..

62
Lokesh Verma ·

@neo.mind.. how did u get the order of the v.p?

1
▬●๋•kể álwáýک● ·

as b.p. depends upon (all dose factors , which skygirl mentioned).... voltality,intramolecular n intermolecular H - bonding + surface area, vander waal's force of attraction, mol. wt.......... so, i thought dat b.p. should b d best parameter which explain v.p. n temp. relation. n dats y i got dat order of v.p.............. ..................................but nw i think am rong, sorry 2 deviate u people. :( .... am apologizing :( but still i amn't able 2 gt any standard parameter to gt v.p. relation.......trahimam

1
gagar.iitk ·

can anybody tell me what a solution in pink stands for
and if for correct one why the soln of skygirl is in pink

1
skygirl ·

[3] lol [9]

am i not correct....

then i am really sorry....

pls let me know the correct thing...

please..

1
gagar.iitk ·

methyl flouride is showing highest H bonding then only u can be right but let me know if that is true

1
skygirl ·

y not methyl fluoride?

F has the highest e-negativity n smallest size.

dats y i thot it should be the strongest

1
gagar.iitk ·

H is not attached directly with the F atom

1
gagar.iitk ·

my ans is
1→ CH3F
2→HCHO

3- CH3OH
2-CH3COOH

first two are gas at normal temp while other are liq

24
eureka123 ·

absolutely correct sir.................soory sky u were wrong............

1
gagar.iitk ·

hey eureka plz see the ur post of kinetix

1
skygirl ·

tx gagar .

24
eureka123 ·

okkkkk

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