Asample of solid sodium hydroxide (naoh) is added to water at 100°c. as the naoh dissolves, the
water boils more rapidly.
is the dissolving of naoh in water endothermic or exothermic?

In Homogenous mixtures, the whole mixture is in the same phase whereas in Heterogeneous mixture, substances can be of two phases and layers may separate. ... Homogeneous mixture could be exemplified as a sugar solution or salt solution whereas Mixture of salt and sand could be used as an example of Heterogeneous mixture.