First, 50.0 g of liquid methanol is vaporized at its boiling point. Then, the gaseous methanol is heated to 500. K. Both of these processes occur at a constant pressure of 1.00 atm, and for both the surroundings are held at a temperature of 550. K. For the entire two-step process, find DH, DS, DSSUR, and DSTOT.

It shows that the experiment is designed properly.

You would be correct, boiling water does disinfect contamination.    the property of disinfecting means to kill  germs, bacteria and other pathogens or contamination  that might cause an infection or cause a person to become sickly. a couple methods of disinfecting are using soap, other cleaning supplies or by simply "boiling" the contaminate.  the reason why boiling water disinfects certain attributes is because some cells cannot survive the heat and pressure.

D. h2o + h2o > h3o + oh- confirmed.