# Why does it take more energy to boil a substance than to melt it?

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Why does boiling require the most energy? Because the heat of vaporization is higher than the heat of fusion. It takes more energy to break the attraction between liquid phase molecules into gas then it does between solid phase molecules into liquid.

## Why does it take more energy to boil a gram of water than to melt a gram of ice?

You’d need about 7 times more energy to vaporize 1 g of water at 100∘C than to melt the same amount of ice at 0∘C . … When you heat ice at 0∘C to get water at 0∘C , you’re essentially weakening these intermolecular forces and giving the water molecules freedom of movement.

## Does it take more energy to heat or melt?

Taking this information in hand we can see that that boiling needs approximately 6 to 7 times more amount of energy than in melting. This is the reason it takes longer in boiling than in melting.

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## Why is more energy needed to vaporize than melt?

Much more energy is required to change the state from a liquid to a gas than from a solid to a liquid. This is because of the large separation of the particles in the gas state. The values of the heats of fusion and vaporization are related to the strength of the intermolecular forces.

## Why does boiling require the most energy?

Why does boiling require the most energy? Because the heat of vaporization is higher than the heat of fusion. It takes more energy to break the attraction between liquid phase molecules into gas then it does between solid phase molecules into liquid. … It doesn’t necessarily take LONGER to boil, it takes MORE HEAT.

## Does it take more energy to melt or boil water?

Taking this information in hand we can see that that boiling needs approximately 6 to 7 times more amount of energy than in melting. This is the reason it takes longer in boiling than in melting.

## Why does it take so much energy to melt ice?

Why does it take so much energy to melt ice? Energy is required to melt a solid because the cohesive bonds between the molecules in the solid must be broken apart so that the molecules can move around at comparable kinetic energies; thus, there is no rise in temperature. …

## How much energy does it take to melt ice?

A total of 334 J of energy are required to melt 1 g of ice at 0°C, which is called the latent heat of melting. At 0°C, liquid water has 334 J g1 more energy than ice at the same temperature. This energy is released when the liquid water subsequently freezes, and it is called the latent heat of fusion.

## Does it take more energy to melt ice or freeze water?

Melting ice costs energy, exactly the same amount as freezing water gives off. The two processes are opposites. According to the laws of thermodynamics, if you reverse a process, the “state variables” like energy are therefore exact opposites too. When you freeze water, you liberate energy that you need to take away.

## Does it require more energy to vaporize water at the boiling point or to melt water at the melting point explain?

6. Does it require more energy to “vaporize” water at the boiling point or to melt water at the melting point? Explain. It takes more energy to vaporize than to melt because the horizontal section of the graph is much longer during the vaporizing, or boiling.

## Why is energy required to melt ice and vaporize water?

No temperature change occurs from heat transfer if ice melts and becomes liquid water (i.e., during a phase change). … Similarly, energy is needed to vaporize a liquid, because molecules in a liquid interact with each other via attractive forces. There is no temperature change until a phase change is complete.

## Does boiling release energy?

When water is boiling is it releasing energy? The amount of energy absorbed when a substance boils, and released when the same amount of substance condenses, is the same. Similarly, the amount of energy absorbed when a substance melts, and released when the same amount of substance freezes, is the same.

## Why does boiling water absorb energy?

For example, when a pot of water is kept boiling, the temperature remains at 100 °C (212 °F) until the last drop evaporates, because all the heat being added to the liquid is absorbed as latent heat of vaporization and carried away by the escaping vapour molecules.

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## What type of energy causes water to boil?

Boiling water on a stove is an example of thermal energy. Thermal energy is produced when the atoms and molecules in a substance vibrate faster due to a rise in temperature.