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tatedason33741
30.10.2020 •
Chemistry
A red hot iron bar is dipped into 600 ml of water ( 600. g of water) which causes
the temperature of the water to rise from 22 degrees celcius to 89 degrees
celcius. Determine the heat lost by the iron bar. hint: The amount of heat lost
= amount of heat gained *
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Ответ:
heat lost by iron bar is 168.2 kJ
Explanation:
The heat gained by the water as a result of temperature rise is given by:
Q = mCΔT
ΔT = change in temperature = final temperature - initial temperature = 89°C - 22°C = 67°C
m = mass of water = 600 g
C = specific heat of water = 4.184 J/g-K
Q = heat gained
Substituting:
Q = 600 * 4.184 * 67
Q = 168.2 kJ
The heat gained by the water is 168.2 kJ
The heat lost by iron bar = heat gained by water
heat lost by iron bar = 168.2 kJ
Ответ:
An alcohol thermometer can easily measure the boiling point of a colorless liquid that boils at 100 °C.
A mercury thermometer can easily measure the boiling point of a colorless liquid that boils at 82 °C.
A mercury thermometer can easily measure the freezing point of a colorless liquid that freezes at −50 °C.
or An alcohol thermometer can easily measure the freezing point of a colorless liquid that freezes at −110 °C.
Explanation:
hope it help's ♡´・ᴗ・`♡