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Evaporation Boiling
i)Evaporation occurs at all temperatures while boiling Occurs at a fixed temperature.
ii) Evaporation occurs at the surface of the liquid while boiling takes place throughout the liquid.
iii)In evaporation no bubbles are formed but in boiling bubbles are formed in the liquid.
iv)In evaporation decrease in atmospheric pressure increases the rate of evaporation while in boiling
decrease in atmospheric pressure lowers the boiling point of the liquid.
Moraa orina answered the question on April 10, 2018 at 18:12
- Explain the factors affecting rate of evaporation(Solved)
Explain the factors affecting rate of evaporation.
Date posted: April 10, 2018. Answers (1)
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An aluminium tray of mass 400g containing 300g of water is placed in a refrigerator. After 80 minutes, the
tray is removed and it is found that 60g of water remains unfrozen at 0^oC. If the initial temperature of the tray and its contents was 20^oC, determine the average amount of heat removed per minute by the refrigerator. Take s.h.c of aluminium = 900JKg-1K-1, s.h.c of water = 4200JKg-1K-1, s.l.h. of fusion of ice = 3.4*25JKg
Date posted: April 10, 2018. Answers (1)
- 3g of dry ice was added to 20g of water at 26^oC in a beaker of negligible heat capacity. After the ice had all melted,...(Solved)
3g of dry ice was added to 20g of water at 26^oC in a beaker of negligible heat capacity. After the ice had all melted, the temperature of water was found to be 12C. Find the specific latent heat of fusion of ice. Take the s.h.c of water =4200JKg-1K-1
Date posted: April 10, 2018. Answers (1)
- A block of ice of mass 40g at 0^oC is placed in a calorimeter containing 400g of water at 20^oC. Ignoring heat absorbed by the...(Solved)
A block of ice of mass 40g at 0^oC is placed in a calorimeter containing 400g of water at 20^oC. Ignoring heat
absorbed by the calorimeter, determine the final temperature of the mixture after all the ice has melted.
Take s.h.c.of water= 4200JKg-1K-1 and the s.l.h. of fusion of ice= 340, 000JKg-1.
Date posted: April 10, 2018. Answers (1)
- 3kg of hot water was added to 9kg of cold water at 2^oC and the resulting temperature was 20^oC.ignoring heat loss by the container, determine...(Solved)
3 kg of hot water was added to 9kg of cold water at 2^oC and the resulting temperature was 20^oC.ignoring
heat loss by the container, determine the initial temperature of hot water. Take s.h.c of water=4200JKg-
1K-1.
Date posted: April 10, 2018. Answers (1)
- In an experiment to determine the specific heat capacity of a metal, a 20g of the metal was transferred from boiling water to a lagged...(Solved)
In an experiment to determine the specific heat capacity of a metal, a 20g of the metal was transferred
from boiling water to a lagged copper calorimeter containing cold water. The water was stirred and a
final steady temperature was realized. The following data was recorded:
-initial temperature of cold water and calorimeter =20^oC
-temperature of boiling water =99^oC
-final temperature of water, calorimeter and metal =23.7^oC
-mass of cold water plus calorimeter =130g
mass of calorimeter =50g
Take s.h.c. of water=4200JKg-1K-1, s.h.c. of copper=400JKg-1K-1.
Use the data above to determine:
Date posted: April 10, 2018. Answers (1)
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Date posted: April 10, 2018. Answers (1)
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A student heated 20Kg of water to a temperature of 80^oC. He then added x Kg of water at 15^oC and the
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Date posted: April 10, 2018. Answers (1)
- 70g of a solid initially at 250C was carefully dropped into water in a calorimeter at 600C. If the final constant temperature of the water...(Solved)
70g of a solid initially at 25^oC was carefully dropped into water in a calorimeter at 60^oC. If the final
constant temperature of the water and the solid was 54^oC and the mass of water is 500g, determine the
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Date posted: April 10, 2018. Answers (1)
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Date posted: April 10, 2018. Answers (1)
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a) The current through the filament
b) The resistance of the filament used in the bulb.
Date posted: April 10, 2018. Answers (1)
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Date posted: April 10, 2018. Answers (1)
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Date posted: April 10, 2018. Answers (1)
- An electrical bulb is labeled 20W, 240V. Calculate:
a) The current through the filament when the bulb works normally
b) The resistance of the filament used...(Solved)
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a) The current through the filament when the bulb works normally
b) The resistance of the filament used in the bulb.
Date posted: April 10, 2018. Answers (1)
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Date posted: April 10, 2018. Answers (1)
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Two conductors A and B are such that the cross section area of A is twice that of B and the length of B is
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Date posted: April 10, 2018. Answers (1)
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Date posted: April 10, 2018. Answers (1)
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enclosed area is 5.0 cm5. Take e0...(Solved)
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Date posted: April 10, 2018. Answers (1)
- What is the average current that flows when a 720µF capacitor is charged to 2V in 0.03s?(Solved)
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Date posted: April 10, 2018. Answers (1)
- How much charge is stored by a 300µF capacitor charged up to 12V? give your answer in (a) µC (b) C
{ans. 3600µC/0.0036C}(Solved)
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Date posted: April 10, 2018. Answers (1)