Particle model of matter

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Cards (13)

What is absolute zero? 
-273 C
The lowest possible temperature. Objects have no thermal energy.
What is kinetic theory? 
all particles above absolute zero are moving in the same way.
What is internal energy?
total kinetic and potential energy of the particles that make up a system.
What is temperature?
the average kinetic energy of the particles.
What happens during a state change? 
forces of attraction between molecules are overcome. On graph, this is the flat region as temperature is constant.
What is specific heat capacity?
amount of energy needed to raise temperature of 1 kg of a substance by 1 degree.
What is kinetic energy?
Kinetic energy is the energy possessed by an object due to its motion.
What is potential energy?
Potential energy is the energy stored in the particles of an object.
What is latent heat? 
amount of energy needed to change state of 1 kg of a substance. Does not change temperature.
What is specific latent heat of vaporisation? 
The amount of heat required to change 1 kg of a substance from a liquid to a gas at its boiling point.
Which is specific latent heat of fusion? 
The amount of energy needed to change 1 kg of a substance from solid to liquid at its melting point.
More energy is required to vaporise 1 kg of water than melt 1 kg of ice because the difference in potential energy is greater between a liquid and a gas than it is between a solid and liquid. More energy is needed to change the state.
Brownian motion: what does random motion of gas mean?
that they have a range of speeds and no preffered direction of movement.