Why does D2O
have a higher boiling point than H2O ​

deuterium is heavier isotope of hydrogen need

high weight of atom will lead to higher boiling point

answer: enthalpy

explanation:

for a exothermic reaction, the energy is released i.e. the energy of the products is lower than the energy of the reactants.

= enthaply

= energy of products

= energy of reactants

as , thus comes out to be negative. negative value of enthalpy shows that the reaction is exothermic.