Interpretation:
Use any two temperatures and their corresponding vapour pressures from the given table to calculate
Concept Introduction:
Vapour pressure is the pressure that is exerted on the walls of a sealed container when a substance in it gets into a gaseous state. To find the vapour pressure at a given temperature, the Clausius-Clapeyron equation is used. We can use the Clausius-Clapeyron equation to construct the entire vaporization curve.
The Clausius-Clapeyron equation is as follows:
where
R = Real gas constant or 8.314 J/(k.mol)
T1=The temperature at which the vapour pressure is known
T2= The temperature at which the vapour pressure is to be found
P1 =The vapour pressures at the temperature T1
P2 =The vapour pressures at the temperature T2
△Hvap= The enthalpy of vaporization of the mercury.
Given:
R= 8.314 J/(K.mol), P1=39.3 mm Hg, P2=68.5 mm Hg, ln P1=3.6712, ln P2=4.2268, T1=500 K, T2=520 K
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