Why the boy takes his hand away from the kettle? Why the boy feels the heat of the kettle? . HEAT. THERMAL EQUILIBRIUM. LEARNING OBJECTIVES. Relationship between temperature and heat. Temperature Temperature is a measure of the degree of hotness of a body/ an object. - PowerPoint PPT Presentation
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Why the boy takes his hand away from the kettle?
Why the boy feels the heat of the kettle?
HEATTHERMAL EQUILIBRIUM
LEARNING OBJECTIVES
Relationship between temperature and heatTemperature Temperature
is a measure of the degree of hotness of a body/ an object.
A hot body has high temperature, whereas a cold body has lower
temperature.
Heat Heat is a form of energy being transferred from a hot body
to a cold body.Total amount of heat in a body depends on the mass,
material and temperature of the body.
Heat and temperature are 2 different physical quantities.
TemperatureHeat The degree of hotness of a body A form of energy
being transferred from a hot body to a cold body.Base quantity unit
: Kelvin (K)Measured in degrees Celsius (0C)Derived quantity unit:
Joule (J)Can be measured using a thermometerNo specific measuring
equipment.
Thermal EquilibriumTwo object are in thermal contact when heat
energy can be transferred between them.
When two object with different degrees of hotness come into
thermal contact, heat energy is transferred between the two
objects.
Thermal equilibrium can be summarized as:There is no net flow of
heat between two objects that are in thermal equilibrium. Two
object in thermal equilibrium have the same temperature. Thermal
equilibrium does not depend on the:Mass Types of materialSize
Shape
Of the two object
The following are some examples of objects in thermal
equilibrium.
Liquid in glass ThermometerThe liquid- in glass Thermometer
works on the principle that liquids expands as the temperature
rises.
The liquid used in thermometer must have the following
characteristics:A) Easily visibleB) Expands or contracts rapidly
over a wide range of temperatureC) Does not stick to the inside of
the capillary tube
The most commonly used liquids in the construction of a
liquid-in-glass thermometer are MERCURY and COLOURED ALCOHOL.
