CIE A Level Physics复习笔记16.1.1 Internal energy
Defining Internal Energy Energy can generally be classified into two forms: kinetic or potential energy The molecules of all substances contain both kinetic and potential energies The amount of kin...
CIE A Level Physics复习笔记15.2.3 Average Kinetic Energy of a Molecule
Average Kinetic Energy of a Molecule An important property of molecules in a gas is their average kinetic energy This can be deduced from the ideal gas equations relating pressure, volume, temperat...
CIE A Level Physics复习笔记15.2.2 Derivation of the Kinetic Theory of Gases Equation
Derivation of the Kinetic Theory of Gases Equation When molecules rebound from a wall in a container, the change in momentum gives rise to a force exerted by the particle on the wall Many molecules...
CIE A Level Physics复习笔记15.2.1 Kinetic Theory of Gases
Assumptions of the Kinetic Theory of Gases Gases consist of atoms or molecules randomly moving around at high speeds The kinetic theory of gases models the thermodynamic behaviour of gases by linki...
CIE A Level Physics复习笔记15.1.3 Ideal Gas Equation
Ideal Gas Equation The equation of state for an ideal gas (or the ideal gas equation) can be expressed as: pV = nRT The ideal gas equation can also be written in the form: pV = NkT An ideal gas is ...
CIE A Level Physics复习笔记15.1.2 Ideal Gases
Ideal Gases An ideal gas is one which obeys the relation: pV ∝ T Where: p = pressure of the gas (Pa) V = volume of the gas (m3) T = thermodynamic temperature (K) The molecules in a gas move around ...
CIE A Level Physics复习笔记15.1.1 The Mole
Amount of Substance In thermodynamics, the amount of substance is measured in the SI unit ‘mole’ This has the symbol mol The mole is a unit of substance, not a unit of mass The mole is defined as: ...
CIE A Level Physics复习笔记14.2.2 Specific Latent Heat Capacity
Defining Latent Heat Capacity Energy is required to change the state of substance Examples of changes of state are: Melting = solid to liquid Evaporation/vaporisation/boiling = liquid to gas Sublim...
CIE A Level Physics复习笔记14.2.1 Specific Heat Capacity
Defining Specific Heat Capacity The specific heat capacity of a substance is defined as: The amount of thermal energy required to raise the temperature of 1 kg of a substance by 1 °C This quantity ...
