"if the heat of fusion for water is 80. cal/g, how many calories are needed to melt 45.0 g of ice at 0 ? c? "

Energy released from changing the phase of a substance from the liquid phase to the solid phase at a constant temperature can be calculated by using the latent heat of fusion. Calculation are as follows:

 Energy = 80 cal / g (45.0 g)

Energy = 3600 cal

both adhesion and cohesion are attractions.

they are different in that adhesion is the force of attraction between the molecules of two different substances, whereas cohesion is the force of attraction between molecules of the same substance.

possible examples include capillary action, in which the adhesion between water and glass causes the water to rise in a narrow tube against the force of gravity.

because of hydrogen bonding, water is extremely cohesive.

this causes molecules on the surface of water to be drawn inward, which is why drops of water form beads on smooth surfaces.

hope this .