# physics thermal physics and ideal gases

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• Created by: abbin003
• Created on: 14-03-20 11:30
what is temperature
a measure of hotness
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what is thermal equillibrium
no net flow of energy, objects in thermal equilibrium must be in the same temperature
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what is internal energy
the sum of the randomly distributed kinetic and potential energies of atoms or molecules within substances
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what is absolute zero
the lowest possible temperature
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what happens to the internal energy when a substance is at absolute zero
minimum internal energy(kinetic energy of the molecules is zero) but due to the electrostatic potential energy between the particles not being zero there's some internal energy
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when a substance reaches it's melting point or boiling point what happens to the temperature and electrostatic potential energy of the substance while changing phase
temperature remains the same but electrostatic potential energy remains the same
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list in order the state of substances from where the electrostatic potential energy fro small to big
solid liquid gas
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what is the value of the electrostatic potential energy of a gas
zero because there's negligible forces between the molecules
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why is the electrostatic potential value of liquid and solid negative
it is negative because energy is required to break the forces
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what is specific heat capacity
the energy required per unit mass to change the temperature by 1k
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what's the equation for specific heat capacity
E=mcΔθ
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what is specific latent heat of a substance
the energy required to change the phase per unit mass wile at a constant temperature
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what is specific latent heat of fusion
when the substance changes from solid to liquid
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what is specific latent vaporisation heat
when the substance changes from liquid to gas
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define a mole
the amount of substance that contains as many elementary entities as there are atoms in 0.012 kg of carbon-12.
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how many molecules does a mole of a substance contain
6.02 x10 to the power of 23
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what does the kinetic theory of matter(model) describe
it describes the behavior of the atoms or molecules in an ideal gas
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what is the equation of state of an ideal gas
pV=nRT
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what is the second state of an ideal gas equation
pV=NkT
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what is the boltzmann constant
the molar gas constant R divided by avogadros constant
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are the kinetic energy of molecules in differnet gases at a given temperature different
no
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what about there r.m.s speeds (root mean square speeds)
yes they will be differnet
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## Other cards in this set

### Card 2

#### Front

what is thermal equillibrium

#### Back

no net flow of energy, objects in thermal equilibrium must be in the same temperature

### Card 3

#### Front

what is internal energy

#### Back ### Card 4

#### Front

what is absolute zero

#### Back ### Card 5

#### Front

what happens to the internal energy when a substance is at absolute zero

#### Back 