Energy released from changing the phase of a substance from the gas phase to liquid phase can be calculated by using the specific latent heat of vaporization. The heat of fusion of water at 0 degrees Celsius is 40.7 kJ/mol. Calculation are as follows:<span> </span>
The observation that indicates that the kinetic-molecular theory has limited use for describing a certain gas is that gas particles are obeying Newton's laws of motion. The correct answer is B.
