One cup of popcorn that produces 131kj when burned in a calorimeter

The amount of kilo calories in one cup of popcorn that produces 131 kj when burned.
1 kilo calorie is equivalent to 4.184 kilo joule
Therefore, 131 kilo joule will be equivalent to;
 131 kj × (1/4.184) = 31.3097 kilo calories
Therefore, the cup of popcorn will produce 31.3097 kilo calories

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.