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Grade: 12th pass

                        

What is the enthalpy change when 3mol of liqili benzene transform to the vapor state at ist boiling point 80degree and at 1bar pressure

6 months ago

Answers : (2)

Arun
24742 Points
							
Dear student
 
change in enthalpy, dH = dU + pdV= dU + dn*R*T
As the change is occuring at the boiling temperature, dH = 3*R*T
use T = 273+80=353K.
6 months ago
Vikas TU
12276 Points
							
Dear student 
You already determined the ΔS for benzene at 353 K by dividing the ΔH at 353 K by the temperature 353 K. Now all you need to do is determine the ΔH at 343 K using Hess' law? Once you do that, you can get the ΔS at 343 K.
6 months ago
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