Estimating the Normal Boiling Point of Carbon Tetrachloride,Carbon tetrachloride, CCl4, was once used as a dry cleaning solvent, but is no longer used because it is carcinogenic. At 57.8 °C, the vapor pressure of CCl4 is 54.0 kPa, and its enthalpy of vaporization is 33.05 kJ/mol. Use this information to estimate the normal boiling point for CCl4.

Estimating the Normal Boiling Point of Carbon Tetrachloride

The normal boiling point of a substance is the temperature at which the vapor pressure of the liquid is equal to the atmospheric pressure, and the liquid boils. In the case of carbon tetrachloride (CCl4), this can be estimated using the vapor pressure and enthalpy of vaporization. At 57.8 °C, the vapor pressure of CCl4 is 54.0 kPa, and its enthalpy of vaporization is 33.05 kJ/mol (Mendelsohn, 2019). This indicates that the vapor pressure of CCl4 will increase with temperature, and the enthalpy of vaporization will decrease. As the vapor pressure increases and the enthalpy of vaporization decreases, the vaporization of CCl4 will become more energetically favorable. Using this data, the normal boiling point of CCl4 can be estimated (Mendelsohn, 2019). As the vapor pressure of CCl4 increases with temperature, it can be assumed that the normal boiling point of CCl4 will be higher than 57.8 °C. By extrapolating the vapor pressure and enthalpy of vaporization data, the normal boiling point of… Cont…