Energy is required in the melting process because high is needed to melt something
Because water requires heat to vaporise it. This is called latent heat. It is absorbed during change from liquid to vapor, and released on condensation of vapor to liquid. there is a similar latent heat transfer during freezing and melting of water (and other substances)
That's because of all the bonds that hold the substance your heating or boiling together. When you heat or boil something your breaking these bonds which requires energy.
because when you melt stuff you have to heat it to high temperatures so you need to use a furnace which requires energy.
yes
Yes.
Electrovalent compounds have high melting and boiling points as they are held by very strong electrostatic force of attraction making the compound stable and therefore they require a lot of energy to break.
they are both vaporization process, but evaporation occur on the surface and boiling occur by forming completed bubbles from the bottom.
Yes.
Melting and boiling are changes of state. Melting changes state from solid to liquid, and boiling changes state from liquid to vapor. Thus, these are physical, not chemical changes. All of the heat energy that goes into changing solid to liquid or liquid to vapor (or any change of state for that matter), is used only to change the state and therefore the temperature of the system does not change.
Melting is an exothermic process; we need heat for melting.
Energy is required in the melting process because high is needed to melt something
Melting requires energy input or absorption because liquid water has more energy than solid water.
Electrovalent compounds have high melting and boiling points as they are held by very strong electrostatic force of attraction making the compound stable and therefore they require a lot of energy to break.
No boiling is heating and energy is added and melting the solid turns into a liquid.
They are both phase changes, this means that until the melting or boiling are complete the temperature of the system remains at the melting or boiling point, despite the continued input of heat energy.
they are both vaporization process, but evaporation occur on the surface and boiling occur by forming completed bubbles from the bottom.
Yes.
The presence of the impurities will cause the boiling points to rise (also the melting points to fall). When you add the impurities, the substance doesn't remain pure affecting the boiling point to increase because now, more energy is required to boil the liquid with impurities. The melting points fall because impure substances require less energy to separate the particles.
Energy is absorbed during melting, boiling and sublimation.
Sublimation, melting, and vaporization are three changes of state which require energy.
Melting & evaporating.
Particles absorb energy when boiling (vapourising), melting and subliming. Particles release energy when freezing and condensing.