The enthalpy of vaporization for methanol is 35.2 kJ/mol. Methanol has a vapor pressure of 101.3 kPa at 64.7 °C. Using the Clausius-Clapeyron equation, what is the vapor pressure for methanol at 44.9 °C? Give your answer in kPa, to the first decimal point.
States of Matter
The substance that constitutes everything in the universe is known as matter. Matter comprises atoms which in turn are composed of electrons, protons, and neutrons. Different atoms combine together to give rise to molecules that act as a foundation for all kinds of substances. There are five states of matter based on their energies of attraction, namely solid, liquid, gases, plasma, and BEC (Bose-Einstein condensates).
Chemical Reactions and Equations
When a chemical species is transformed into another chemical species it is said to have undergone a chemical reaction. It consists of breaking existing bonds and forming new bonds by changing the position of electrons. These reactions are best explained using a chemical equation.
Clausius-Clapeyron equation
ln (P1/P2) = deltaHvap /R (1/T2-1/T1)
P2 = 101.3 kPa
T2 = 64.7 0C = 337.85K
T1 = 44.90C = 318.05 K
deltaHvap = 35.2 kJ/mol
R = 8.314*10-3 kJ/K*mol
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