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The molar heat of vapourization of tolue...

The molar heat of vapourization of toluene is `DeltaH_v` if its vapour pressure at 315 K is 60 torr & that at 355 K is 300 torr then `DeltaH_v=?`(log 2=0.3)

A

37.5 kJ/mole

B

3.75 kJ/mole

C

37.5 J/mol

D

3.75 J/mole

Text Solution

Verified by Experts

The correct Answer is:
A
[Apply clausius -Clapeyron equation]
`"log"300/60=(DeltaH)/(2.303xx8.314)(1/315-1/355)`
`DeltaH_v=`37.5 kJ/mol
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