Temperature Made by Ms Priya Heat Energy VOCABULARY Fahrenheit Thermodynamic Fundamental Conversion Absolute Expansion Contraction Particles Thermometer Electromagnetic waves ID: 460658
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Slide1
Heat EnergyTemperature
Made by Ms. PriyaSlide2
Heat Energy
VOCABULARY
Fahrenheit
Thermodynamic
Fundamental
Conversion
Absolute
Expansion
Contraction
Particles
Thermometer
Electromagnetic wavesSlide3
Thermodynamics
Thermodynamics
is
a branch of physics
concerned with heat and temperature and their relation to energy and work.Slide4
Temperature
Temperature and heat are not the same.
Temperature is a
measurement of heat
.
Temperature tells whether something is hot or cold.Slide5
Temperature
The temperature of a substance is a result of the speed at which its molecules are moving.
The faster the molecules are moving, the higher the temperature of the substance
.Slide6
There are three
main temperature scales
:
°F
, the
Fahrenheit Scale (used in the US) °C, the Celsius Scale (part of the Metric System, used in most other countries)
K , the Kelvin scaleSlide7
Celsius
The Celsius (or centigrade) Temperature
Scale
Celsius
, also known as centigrade, is a scale and
unit of measurement for temperature. Degree Celsius (°C)0 °C as the freezing point of
water
at normal pressure.
100
°C
as
the
boiling point
of
water at normal pressure.Slide8
Fahrenheit
Fahrenheit
is a thermodynamic temperature scale,
called as degree Fahrenheit
(°F
)Freezing point of water, 32°F
Normal human body temperature, 98.6°FBoiling water (at normal pressure) 100° in Celsius, but 212° in Fahrenheitwater
freezes
at
0
° in Celsius, but 32° in FahrenheitSlide9
Kelvin
The
Kelvin or Absolute scale of
temperature
The
freezing point of water is 273.15 K
Boiling point is 373.15 K. The term "degree" is not used. The abbreviation or unit is "K".Slide10Slide11Slide12
Temperature conversion
The formula to convert
Celsius to Kelvin
is:
T
K = TC + 273
For example: Convert 27° C to Kelvin. Solution: K = °C + 273 K = 27 + 273 K = 300 300 K Slide13
Temperature conversion
The
Fahrenheit to Celsius
conversion equation may be expressed in this form
:
Celsius to Fahrenheit
(°C × 9/5) + 32 = °FFahrenheit to Celsius
(°F - 32) x
5
/
9
= °C
T
C
= 5/9(T
F
- 32)Slide14
Temperature conversion
Example:
Convert
26° Celsius
(a nice warm day)
to Fahrenheit Answer: 26° × 9/5 = 234/5 = 46.8 46.8 + 32 =
78.8° FSlide15Slide16
Absolute zero
Absolute
zero is the lowest possible temperature where nothing could be colder and no heat energy remains in a substance
.
A
bsolute zero is 0 K on the Kelvin scale,
and –273.15 degrees Celsius on the Celsius scale.Absolute zero is equal to –459.67 degrees F on the Fahrenheit scale.Slide17
Exercise
Convert
10° Celsius
(A cool
day
) to Fahrenheit.Convert 98.6° Fahrenheit
(normal body temperature) to Celsius.Convert 68° Fahrenheit to Celsius.A healthy person has a body temperature of 98.6 °F. What is this temperature in Kelvin?If the temperature will be 303 K today, how can you express that temperature in °C and °F?
What
is the temperature in Celsius of 77 °F?Slide18
Exercise
answers
50F
37
°C
20
°C
310K
30°C 86F
25°C