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The vapor pressure of ethanol is 100mmHg at 34.9 degrees Celsius. What is it's vapor pressure at 61.5 degrees Celsius? (Delta H vap for ethanol is 39.3 kJ/mol)

Question

The vapor pressure of ethanol is 100mmHg at 34.9 degrees Celsius. What is it's vapor pressure at 61.5 degrees Celsius? (Delta H vap for ethanol is 39.3 kJ/mol)

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Step 1

The temperature given in degree Celsius is converted into Kelvin scale.

T 34.9 C+273.15K-308.05K
T 61.5 C+273.15K-334.65K
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T 34.9 C+273.15K-308.05K T 61.5 C+273.15K-334.65K

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Step 2

Given values is substituted...

1
P.
In
vap
T T
39.3kJ.mol
1
1
n
100 mm Hg 0.008314KJ.K1.mol 308.05K 334.65K
-4727x2.517x104=1.189
n
100 mm Hg
1.189-3.23
100mm Hg
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1 P. In vap T T 39.3kJ.mol 1 1 n 100 mm Hg 0.008314KJ.K1.mol 308.05K 334.65K -4727x2.517x104=1.189 n 100 mm Hg 1.189-3.23 100mm Hg

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