The boiling point of acetic acid is 118.1 celsius and its latent heat of vaporization is 121 cal/gm a solution containing 0.434 gram of anthracene is 44. 16 gram acetic acid boils at 11 8.24 celsius. what is the molecular weight of anthracene?
Answers
Answered by
4
Answer:
For a given aqueous solution
ΔT
b
=K
b
×molality
ΔT
f
=K
b
×molality
∴
T
f
ΔT
b
=
K
f
K
b
=
1000l
v
RT
b
2
×
RT
f
2
1000l
f
T
f
ΔT
b
=
T
f
2
×l
v
T
b
2
×l
f
∵T
b
=100+273=373K
T
f
=0+273=273K
l
f
=80 calg
−1
l
v
=540 calg
−1
∴
ΔT
f
0.1
=
273×273×540
373×373×80
ΔT
f
=0.361
∴T
f
=0.0−0.361=−0.361
o
C
Answered by
2
Answer:
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