A 20.00 mL sample of the standard oxalic acid solution (use the molarity calculated from Q1 above) requires 24.16 mL of your base to reach the endpoint. Calculate the molarity of the base to 4 sig. fig.

Exothermic,  physical change after it is already baked

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.