The vapor pressure of and unknown liquid is 542 mmHg at 30.1°C and 153 mmHg at -19.8°C. What is the ΔHvap the liquid?

The vapor pressure of ethanol (C2H5OH) at 19 °C is 40.0torr. A 1.00-g sample of ethanol is placed in a 2.00 L containerat 19 °C. If the container is closed and the ethanolis allowed to reach equilibrium with its vapor, how manygrams of liquid ethanol remain?

Use the following vapor pressure data to answer the questions: Liquid Ag Ni Vapor Pressure, torr Temperature, °C 10 1540 10 2090 (1) In which liquid are the attractive forces the weakest ? (2) Which liquid would be expected to have the highest heat of vaporization?

Can you please help me understand how to get the answer to this question? 10. The value of (delta)Hvaporation of substance X is 65.7 kJ/mol, and its normal boiling point is 62.5 degrees Celsius. Calculate (delta)S, (delta)Ssurr, and (delta)G for th evaporation of one mole of this substance at 62.5 degrees Celsius and 1 atm.