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29351547
2.1 Simple kinetic molecular model of matter (Thermal Physics)
Description
Syllabus (extended) 2021
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igcse
physics
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Brigitte Bunge
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Brigitte Bunge
over 3 years ago
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Resource summary
2.1 Simple kinetic molecular model of matter (Thermal Physics)
2.1.1 States of matter
state the distinguishing properties of solids, liquids and gases
2.1.2 Molecular model
describe qualitatively the molecular structure of solids, liquids and gases
Annotations:
in terms of the arrangement, separation and motion of the molecules
relate the properties of solids, liquids and gases to the forces and distances between the molecules and to the motion of the molecules
interpret the temperature of a gas in terms of the motion of its molecules
describe qualitatively the pressure of a gas in terms of the motion of its molecules
explain pressure in terms of the change of momentum of the particles striking the walls creating a force
show an understanding of the random motion of particles in a suspension as evidence for the kinetic molecular model of matter
describe this motion (sometimes known as Brownian motion)
Annotations:
in terms of random molecular bombardment
show an understanding that massive particles may be moved by light, fast-moving molecules
2.1.3 Evaporation
describe evaporation
Annotations:
in terms of the escape of more-energetic molecules from the surface of the liquid
demonstrate an understanding of how ... influence evaporation
temperature
surface area
draught over a surface
relate evaporation to the consequent cooling of the liquid
explain the cooling of a body in contact with an evaporating liquid
2.1.4 Pressure changes
Describe qualitatively, in terms of molecules, the effect on the pressure of a gas of:
a change of temperature at constant volume
a change of volume at constant temperature
recall and use the equation pV = constant for a fixed mass of gas at constant temperature
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