# At what temperature does water have the highest density?

39degF Water grows denser as it cools. Water is the densest at 39 degrees Fahrenheit (or 3.98 degrees Celsius). At this temperature, ice floats on water.

Water's density decreases as its temperature increases. At \$0^{\circ}\$C, water is completely frozen and becomes more dense as it gets colder. At \$100^{\circ}\$C, it is completely liquid and becomes less dense as it gets hotter. Density is measured in grams per cm3 (grams per cubic centimeter).

The density of water changes as well at higher temperatures. As water heats up, its molecules move faster and occupy more space. This leaves more room for other substances - such as oxygen - which are also present in water. The result is that water can become more reactive as it gets hotter. For example, it's easier to start a fire when you're using hot water than when you're using cold water.

As water cools, its molecules slow down and want to fill up their orbits around the nucleus. The result is that as water cools, it becomes less reactive - and tends to be safer to use.

## Why is water the densest at 39 degrees?

This is due to the fact that water's molecular structure and hydrogen bonding take up more space when it is frozen solid than when it is a warmer liquid. In other words, even though the water is hardening into ice, the molecules are more apart. This leaves more room for them to be dense.

Ice floats on water because there are fewer bonds connecting the ice crystals together than there are between the molecules of water. The same thing happens with glass: There are many spaces between the molecules when it is cold, which makes it hard but also light. As it warms up, those spaces fill in, becoming less empty and thus making it heavier.

This is why ice cubes float on top of the water they were dropped into. When you add food coloring or alcohol to water, it becomes more difficult for ice to form, so there is less competition between the ice and the liquid for space. This means there are more molecules per cubic inch, so the liquid becomes more dense.

Food colors and alcohol affect the temperature of the water dramatically. When you add color or alcohol to hot water, it absorbs heat from the surrounding air and water, causing it to become hotter faster. If you do this with cold water, however, it will cause the water to become colder faster as well. This is because cold molecules want to stay away from each other, while warm ones want to get closer.

## At what temperature is the water the heaviest?

39degF Water is the densest at 39 degrees Fahrenheit (or 3.98 degrees Celsius). This is due to the fact that the molecules are closest together at this temperature. The molecules get heavier as they get closer together. At 0 degrees Fahrenheit, or -18 degrees Celsius, the water is still heavy but not as dense as warmer water.

The more molecules in a given volume of water, the higher its density will be. So if you could compress all the water into one large molecule it would be very dense.

Water is a polar molecule which means it has both positive and negative charges distributed throughout its structure. These charges attract each other and cause the molecules to stick together. The force of attraction between two positive charges is greater than between two negative charges or between one charge and itself. This is why atoms with many electrons tend to be neutral overall and don't attract each other much.

Atoms with few electrons tend to have an electric field around them. This attracts other atoms with many electrons so they fall into a ring structure around the first atom. There are different levels of attraction between different types of atoms and molecules. For example, hydrogen bonds exist between hydrogens and oxygens. These are stronger than ionic bonds which exist between ions from opposite poles of an electrical battery.

#### About Article Author

##### Sally Keatts

Sally Keatts is a teacher who has been teaching for over 20 years. She loves to teach children and help them learn about new things. She also enjoys working with adults on topics such as mindfulness, stress management, and time management.