Question

An ice cube is placed in a glass of room temperature. In which direction will heat flow? What happens to the ice cube's molecules as heat flows? What happens to the water's molecules as heat flows?

Answer 1

According to the thermodynamics law heat always flow from hot to cool object.

So the heat in this case will flow from room environment to ice cube ..

As the heat flow from environment to ice cube the ice starts to melt and phase change occurs and ice becomes water at 0°c . Here latent heat is supplied by the environment which is responsible only for the phase change not for change in temperature.

Then when all the ice converted to water then heat from environment flow untill the temperature of water and the environment comes in equilibrium.

So after phase conversion the heat flows to water will change its temperature..