Answer :
Final answer:
The standard boiling point for ethanol is simply the temperature given along with its heat of vaporization, which is 78.20°C. Additional vapor pressure information is not required to determine this.
Explanation:
The student is asking about the standard boiling point of ethanol, which is the temperature at which its vapor pressure equals the atmospheric pressure (1 atm) at standard conditions. Given the heat of vaporization (or enthalpy of vaporization) for ethanol is 38.6 kJ/mol at 78.2°C, this temperature is already the standard boiling point for ethanol. Therefore, to two decimal places, the standard boiling point for ethanol is 78.20°C. This question also provided additional information about the vapor pressure of ethanol at two different temperatures, implying the use of this information to estimate enthalpy of vaporization using Clausius-Clapeyron equation and such, but since the boiling point was directly given, we do not need to calculate it.
