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science > heat > Flashcards

heat Flashcards

1
Q

What is Temperature?

A

measure of the Mean KInetic energy POssesed by particles That form an object

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2
Q

what is use to measure temperature and who invented it first?

A

thermometer
Gallileo Galilei
1600A.D

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3
Q

what are types of thermometers?

A

Glass mercury
Glass Alcohol
Digital

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4
Q

what are the uses of glass mercury thermometer?

A

*has a uniform Expansion over a broad range of temperature
*good thermal conductor
*liquid over a broad range of temperature

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5
Q

what are the disadvantage of glass mercury thermometer?

A

mercury is toxic

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5
Q

what is use in glass alcohol thermometer?

A

ethyl Alcohol

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6
Q

what is the melting point of ethanol?

A

-115 degrees celsius
measuring low temperatures

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7
Q

what are the uses of glass alcohol thermometer?

A

*has a high expansion relative to most other liquids
*expansion increases uniformly with temperature

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8
Q

in what thermometer you can read temperature directly?

A

in digital thermometer

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9
Q

what are special features of clinical thermometer?

A

*there is a fine bend in the capillary tube containing mercury
*temperature range is short
(35 degrees celsius to 43 degrees celsius)

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10
Q

how to use thermometers correctly?

A

*thermometer should be held vertically
so bulb of the thermometer is well in contact with substance/liquid of temperature which should be measured.
*when taking readings should be adjusted to eye level

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11
Q

what are 3 temperature scales?

A

*Celsius scale
*Fahrenheit scale
*Kelvin scale

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12
Q

who introduced Celsius scale?

A

Anderse Celsius

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13
Q

who introduced Fahrenhite scale?

A

Gabriel Fahrenhite

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14
Q

who introduced Kelvin scale?

A

Lord Kelvin

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15
Q

what is lower fixing point means?

A

freezing point of water

16
Q

what is upper fixing point means?

A

boiling point of water

17
Q

what is human body temperature in Celsius Scale?

A

37 degrees Celsius

18
Q

what is human body temperature in Farenhite Scale?

A

98.6 degrees farenhite

19
Q

what is human body temperature in Kelvin Scale?

A

310K

20
Q

what is lower fixing point in Celsius Scale?

A

0

21
Q

what is lower fixing point in farenhite Scale?

A

32

22
Q

what is lower fixing point in Kelvin Scale?

A

273.15K

23
Q

what is upper fixing point in Celsius Scale?

A

100

24
Q

what is upper fixing point in Kelvin Scale?

A

373.15K

25
Q

what is upper fixing point in farenhite Scale?

A

212

26
Q

what is absolute zero in Celsius Scale?

A

-273.15

27
Q

what is absolute zero in kelvin Scale?

A

0

28
Q

what is absolute zero means?

A

minimum value to the temperature that any object can reach

29
Q

when kinetic energy of particles decreases what happen to temperature of the object?

A

the temperature of the object decreases

30
Q

when kinetic energy of particles are0 what happen to temperature of the object?

A

the temperature of the object is absolute zero

31
Q

what is the international unit of measuring temperature?

A

kelvin

32
Q

how many divisions in the kelvin scales are equal to one division in the Celsius scale?

A

*100 degrees celcius divisions equals to 100 degrees Kelvin divisions
*1 degree celcius divisions equals to 10 degree Kelvin divisions

33
Q

what has to be done in order to convert a temperature value given in Celsius into Kelvin?

A

273 should be added to given Celsius value

34
Q

indicate 50 degree celsius in kelvin

A

50
+273
equals to 323

35
Q

what has to be done in order to convert a
temperature value given in Kelvin to Celsius ?

A

273 should be substracted to given Celsius value

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