An ideal gas system undergoes an isovolumetric process in which 20J of energy is added as heat to the gas. What is the change in the systems internal energy

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.

Idk the answer imthink snail cant mate they dont lol