# What is required for a liquid to boil?

Contents

It requires energy to change from a liquid to a gas (see enthalpy of vaporization). In addition, gas molecules leaving the liquid remove thermal energy from the liquid. Therefore the temperature of the liquid remains constant during boiling.

## What must happen for a liquid to boil?

Boiling. A liquid boils at a temperature at which its vapor pressure is equal to the pressure of the gas above it. The lower the pressure of a gas above a liquid, the lower the temperature at which the liquid will boil.

## What is the energy needed to boil a liquid?

Why It Matters

The energy required to change water from a liquid to a solid is 333.7 kJ/kg while the energy required to boil water is 2257 kJ/kg.

## What is the sublimation process?

Sublimation is the conversion between the solid and the gaseous phases of matter, with no intermediate liquid stage. For those of us interested in the water cycle, sublimation is most often used to describe the process of snow and ice changing into water vapor in the air without first melting into water.

## How does liquid become gas?

Answer: When a liquid changes to gas, the particles absorb heat energy and they start vibrating faster and distance between them increases. … The intermolecular forces between water molecules decrease when a liquid turns into a gaseous liquid or steam.

## Why is energy needed to boil water?

Boiling water is an endothermic process, which supplies heat to the water molecules, increasing their potential energy. … For chemical processes, the heat supplied, among other things, helps the reactants overcome activation energy, which is the energy needed to get a reaction started.

## How do you calculate the energy needed to boil?

The energy needed E=SH times change in temperature times the total mass in grams(Which is 1000gram for a liter of water). That gives you 4.184•79•1000 which is 330,536J, or 330.54KJ.

## How much energy is required to boil a liter of water?

Based on the above answers and examples, to boil 1 litre of water from 20C to 100C, requiring 0.183 kWh of either electricity or gas, at todays energy prices GAS is 68% cheaper than electricity.

## What is an example of Desublimation?

Probably the most familiar example of desublimation is the formation of frost on a window in winter. Water vapor in cold air freezes into ice without ever becoming liquid water. This is also how hoar frost forms and accounts for some frost formation in home freezers. Another example is soot formation in chimneys.

## What industry uses Sublimation?

It also works for ID cards (this is one of the largest industries using the printing method in-house.) It is also heavily used in companies that print on metal, including the automotive industry as well as signage companies. There are many businesses that use dye sublimation ink, printers, and paper.

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## How does ice sublimate?

When ice turns directly into water vapor without first transitioning into a liquid, it is referred to as “sublimation.” In fact, any solid that turns into a vapor without going through the liquid phase can be said to sublime or “sublimate.”

## What is evaporated water called?

Evaporation on a Farm. … Evaporation happens when a liquid turns into a gas. It can be easily visualized when rain puddles “disappear” on a hot day or when wet clothes dry in the sun. In these examples, the liquid water is not actually vanishing—it is evaporating into a gas, called water vapor.

## How can a liquid become a solid?

Freezing occurs when a liquid is cooled and turns to a solid. Eventually the particles in a liquid stop moving about and settle into a stable arrangement, forming a solid. This is called freezing and occurs at the same temperature as melting.

## At what temperature does the water boil?

A liquid at high pressure has a higher boiling point than when that liquid is at atmospheric pressure. For example, water boils at 100 °C (212 °F) at sea level, but at 93.4 °C (200.1 °F) at 1,905 metres (6,250 ft) altitude. For a given pressure, different liquids will boil at different temperatures.