What is absolute zero?

-273.15 C. It’s theoretically the temp. where all atomic movement stops, but it hasn’t been reached.

Absolute zero is the point on the thermodynamic (absolute) temperature scale where all kinetic motion in the particles comprising matter ceases and they are at complete rest in the “classic” (non-quantum mechanical) sense. At absolute zero, matter contains no heat energy. By international agreement, absolute zero is a temperature of precisely −273.15 °C (−459.67 °F). Throughout the scientific world where measurements are made in SI units, thermodynamic temperature is measured in kelvins where absolute zero is 0 K. Many engineering fields in the U.S. measure thermodynamic temperature using the Rankine scale where absolute zero is 0 °R.

The absolute zero state was first proposed by Guillaume Amontons in 1702 who was investigating the relationship between pressure and temperature in gases. He lacked accurate and precise thermometers so his results were only semi-quantitative, but he established that the pressure of a gas increases by roughly one-third between “cold” temperatures and the boiling point of water. His work led him to speculate that a sufficient reduction in temperature would lead to the disappearance of pressure. The problem is that all real gases liquefy during the approach to absolute zero.

In 1848, William Thomson, 1st Baron Kelvin proposed an absolute thermodynamic temperature scale in which equal reduction in measured temperature gave rise to equal reduction in the heat of a body. This freed the concept from the constraints of the gas laws and established absolute zero as the temperature at which no further heat could be removed from a body. Absolute zero has never been reached, and it appears it never will be, although some have come remarkably close. Absolute zero may be asymptotically approached like the speed of light, but never attained.

Absolute zero is the thermodynamic temperature at which there is practically no molecular motion. Molecules at this temperature have been slowed down to such an extent that they do not move at all. Absolute zero has a value of 0 Kelvin. This is equivalent to -273 degrees Celcius. This is the lowest possible temperature.

Temperature is a physical quantity which gives us an idea of how hot or cold an object is. The temperature of an object depends on how fast the atoms and molecules which make up the object can shake, or oscillate. As an object is cooled, the oscillations of its atoms and molecules slow down. For example, as water cools, the slowing oscillations of the molecules allow the water to freeze into ice. In all materials, a point is eventually reached at which all oscillations are the slowest they can possibly be. The temperature which corresponds to this point is called absolute zero.

There are three temperature scales. Most people are familiar with either the Fahrenheit or the Celsius scales, with temperatures measured in degrees Fahrenheit (º F) or degrees Celsius (º C) respectively. On the Fahrenheit scale, water freezes at a temperature of 32º Fahrenheit and boils at 212º F. Absolute zero on this scale is not at 0º Fahrenheit, but rather at -459º Fahrenheit. The Celsius scale sets the freezing point of water at 0º Celsius and the boiling point at 1º Celsius. On the Celsius scale, absolute zero corresponds to a temperature of -273º Celsius.

Source(s): http://www.pa.msu.edu/~sciencet/ask_st/012992.html

Absolute zero is the point on the thermodynamic (absolute) temperature scale where all kinetic motion in the particles comprising matter ceases and they are at complete rest in the “classic” (non-quantum mechanical) sense. At absolute zero, matter contains no heat energy. By international agreement, absolute zero is a temperature of precisely −273.15 °C (−459.67 °F). Throughout the scientific world where measurements are made in SI units, thermodynamic temperature is measured in kelvins where absolute zero is 0 K. Many engineering fields in the U.S. measure thermodynamic temperature using the Rankine scale where absolute zero is 0 °R.

An Absolute zero is a temperature of -273.15 Celzius, and it’s known as 0 Kelvin. And when someone tells you absolute zero thet means regullary 0 Kelvin!

It is the temperature defined as zero kelvin. This temperature is important because this is when there is no longer thermal energy in compounds and sub atomic particles are not excited into motion or promotion by this energy. There is theory from einstien and bohr suggesting that being at zero kelvin gives materials a different state of matter that behaves very strangely.

We havent been able to attain this temperature though I have heard that we can get down to about 0.5 Kelvin.

Absolute zero is zero degrees Kelvin (abbreviated ‘K’). It is the temperature at which the motion of molecules and atoms are at their slowest. Absolute zero, measured in degrees Fahrenheit is -459 and measured on the Celsius scale is -273 degrees.

Source(s): studied chemistry

absolute zero is the zero point the kelvin scale. it is equivalent to -273.16 °C on the Celsius scale. This zero point is considered the lowest possible temperature of anything in the universe. so the Kelvin scale is also known as the “absolute temperature scale”.

Source(s): http://www.windows.ucar.edu/earth/Atmosphere/tempe…

absolute zero is a temperature of precisely −273.15 °C.

It is scientifically the point on the thermodynamic (absolute) temperature scale where all kinetic motion in the particles comprising matter ceases and they are at complete rest.

FYI: At absolute zero, matter contains no heat energy.

Absolute Zero is equal to 0 degrees Kelvin, -459 degrees fahrenheit and it is -273 degrees celcius