Atoms and Heat: How Temperature Affects Motion

In summary: No, I mean if the particles are not in an atom.. Individually floating around. Would they move from heat, or only atoms affected by it?Only atoms move from heat.
  • #1
ComputerPsi
24
0
Why do atoms move faster in a higher temperature?
If an atom was initially not moving at all, and then heat was applied to it, would it start moving? If so, what direction will it move in?
 
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  • #2
It is not possible for an atom to not be moving at all, except at absolute zero, which is unobtainable.

Atoms move faster at higher temperatures because that is how we define temperature. Temperature is related to the average kinetic energy of particles in a substance. The higher their kinetic energy (the faster they are moving), the faster will be the measurement of the thermometer.

"Heat" and "temperature" are statistical concepts which apply to large collections of atoms simultaneously. It is not very sensible to describe a single atom as having a temperature; nor is it sensible to talk about applying heat to one single atom.

- Warren
 
  • #3
OK... Thats understood, but it raises 2 questions.
1. What direction do the atoms go? Or do they just bounce off other atoms?
2. Do only the atoms move around from kinetic energy, or do individual particles like protons, nutrons, and electrons move also?
 
  • #4
ComputerPsi said:
OK... Thats understood, but it raises 2 questions.
1. What direction do the atoms go? Or do they just bounce off other atoms?
2. Do only the atoms move around from kinetic energy, or do individual particles like protons, nutrons, and electrons move also?

1) The direction of the atoms are completely random according to the Kinetic Molecular Theory.

2) Only the atoms move, the protons and neutrons are fixed in the atom as being the nucleus with electrons "rotating" around the nucleus. If the atoms move fast enough, some atoms will get ionized (they will lose 1, some, or all electrons).
 
  • #5
ArmoSkater87 said:
Only the atoms move, the protons and neutrons are fixed in the atom as being the nucleus with electrons "rotating" around the nucleus. If the atoms move fast enough, some atoms will get ionized (they will lose 1, some, or all electrons).

No, I mean if the particles are not in an atom.. Individually floating around. Would they move from heat, or only atoms affected by it?

Btw, thanks for the replies. It answers a couple of questions. :smile:
 

1. What is an atom and how does it relate to heat?

An atom is the smallest unit of matter that retains the properties of an element. Heat is the energy that is transferred between objects with different temperatures, and atoms are constantly in motion due to the energy they possess. Therefore, the movement of atoms is directly related to the presence of heat.

2. How does temperature affect the motion of atoms?

As the temperature increases, the atoms in a substance vibrate more rapidly. This increased motion causes the atoms to collide with each other and transfer energy, leading to an overall increase in the kinetic energy of the substance. On the other hand, as the temperature decreases, the atoms have less energy and move slower, resulting in a decrease in the substance's overall kinetic energy.

3. Can temperature change the state of matter of an atom?

Yes, temperature plays a crucial role in changing the state of matter of an atom. As the temperature increases, the atoms in a substance gain enough energy to overcome the forces holding them together, resulting in a change from solid to liquid to gas. Similarly, as the temperature decreases, the atoms lose energy and become more tightly bound, causing a change from gas to liquid to solid.

4. How is heat transferred between atoms?

Heat can be transferred between atoms through three main methods: conduction, convection, and radiation. Conduction is the transfer of heat through direct contact between atoms, while convection is the transfer of heat through the movement of atoms in a liquid or gas. Radiation is the transfer of heat through electromagnetic waves, which can travel through empty space.

5. How is temperature measured and what units are used?

Temperature is typically measured using a thermometer, which contains a liquid (such as mercury or alcohol) that expands or contracts with changes in temperature. The units used to measure temperature vary depending on the system of measurement, with the most common being Celsius (°C), Fahrenheit (°F), and Kelvin (K). Celsius and Fahrenheit are based on the freezing and boiling points of water, while Kelvin is based on absolute zero, the point at which all atomic motion stops.

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