heat Flashcards
What is Temperature?
measure of the Mean KInetic energy POssesed by particles That form an object
what is use to measure temperature and who invented it first?
thermometer
Gallileo Galilei
1600A.D
what are types of thermometers?
Glass mercury
Glass Alcohol
Digital
what are the uses of glass mercury thermometer?
*has a uniform Expansion over a broad range of temperature
*good thermal conductor
*liquid over a broad range of temperature
what are the disadvantage of glass mercury thermometer?
mercury is toxic
what is use in glass alcohol thermometer?
ethyl Alcohol
what is the melting point of ethanol?
-115 degrees celsius
measuring low temperatures
what are the uses of glass alcohol thermometer?
*has a high expansion relative to most other liquids
*expansion increases uniformly with temperature
in what thermometer you can read temperature directly?
in digital thermometer
what are special features of clinical thermometer?
*there is a fine bend in the capillary tube containing mercury
*temperature range is short
(35 degrees celsius to 43 degrees celsius)
how to use thermometers correctly?
*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
what are 3 temperature scales?
*Celsius scale
*Fahrenheit scale
*Kelvin scale
who introduced Celsius scale?
Anderse Celsius
who introduced Fahrenhite scale?
Gabriel Fahrenhite
who introduced Kelvin scale?
Lord Kelvin
what is lower fixing point means?
freezing point of water
what is upper fixing point means?
boiling point of water
what is human body temperature in Celsius Scale?
37 degrees Celsius
what is human body temperature in Farenhite Scale?
98.6 degrees farenhite
what is human body temperature in Kelvin Scale?
310K
what is lower fixing point in Celsius Scale?
0
what is lower fixing point in farenhite Scale?
32
what is lower fixing point in Kelvin Scale?
273.15K
what is upper fixing point in Celsius Scale?
100
what is upper fixing point in Kelvin Scale?
373.15K
what is upper fixing point in farenhite Scale?
212
what is absolute zero in Celsius Scale?
-273.15
what is absolute zero in kelvin Scale?
0
what is absolute zero means?
minimum value to the temperature that any object can reach
when kinetic energy of particles decreases what happen to temperature of the object?
the temperature of the object decreases
when kinetic energy of particles are0 what happen to temperature of the object?
the temperature of the object is absolute zero
what is the international unit of measuring temperature?
kelvin
how many divisions in the kelvin scales are equal to one division in the Celsius scale?
*100 degrees celcius divisions equals to 100 degrees Kelvin divisions
*1 degree celcius divisions equals to 10 degree Kelvin divisions
what has to be done in order to convert a temperature value given in Celsius into Kelvin?
273 should be added to given Celsius value
indicate 50 degree celsius in kelvin
50
+273
equals to 323
what has to be done in order to convert a
temperature value given in Kelvin to Celsius ?
273 should be substracted to given Celsius value
