A plece of metal is put into a 25 ml cup of water that was at 50 degrees celcius and the water cools to 20 degrees celcius. How much energy was transferred to the metal?
Specific heat for water is 4.184 VC

Acovalent bond is formed between the two hydrogen bonds

Ithink is a because if say increased in electronegativity

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.