Thermometer Cambridge IGCSE O level Physics 0625/0972/5054 Lesson 43 part b

Описание: 2.2 Thermal properties and temperature
2.2.1 Thermal expansion of solids, liquids and gases
Core
•• Describe qualitatively the thermal expansion of
solids, liquids, and gases at constant pressure
•• Identify and explain some of the everyday
applications and consequences of thermal
expansion
Supplement
•• Explain, in terms of the motion and arrangement
of molecules, the relative order of the magnitude
of the expansion of solids, liquids and gases
2.2.2 Measurement of temperature
Core
•• Appreciate how a physical property that
varies with temperature may be used for
the measurement of temperature, and state
examples of such properties
•• Recognise the need for and identify fixed points
•• Describe and explain the structure and action of
liquid-in-glass thermometers
Supplement
•• Demonstrate understanding of sensitivity, range
and linearity
•• Describe the structure of a thermocouple and
show understanding of its use as a thermometer
for measuring high temperatures and those that
vary rapidly
•• Describe and explain how the structure of
a liquid-in-glass thermometer relates to its
sensitivity, range and linearity
2.2.3 Thermal capacity (heat capacity)
Core
•• Relate a rise in the temperature of a body to an
increase in its internal energy
•• Show an understanding of what is meant by the
thermal capacity of a body
Supplement
•• Give a simple molecular account of an increase in
internal energy
•• Recall and use the equation
thermal capacity = mc
•• Define specific heat capacity
•• Describe an experiment to measure the specific
heat capacity of a substance
•• Recall and use the equation
change in energy = mcΔT
2.2.4 Melting and boiling
Core
•• Describe melting and boiling in terms of energy
input without a change in temperature
•• State the meaning of melting point and boiling
point
•• Describe condensation and solidification in terms
of molecules
Supplement
•• Distinguish between boiling and evaporation
•• Use the terms latent heat of vaporisation and
latent heat of fusion and give a molecular
interpretation of latent heat
•• Define specific latent heat
•• Describe an experiment to measure specific
latent heats for steam and for ice
•• Recall and use the equation energy = ml