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Class 11
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Physics
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Thermal Properties of Matter
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Latent Heat
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Problems based on latent heat of fusion ...
Problems based on latent heat of fusion and vaporization
15 Mins
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Advanced Knowledge of Latent Heat
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Latent Heat and its Problems
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QUICK SUMMARY WITH STORIES
Introduction to latent heat
2 mins
Problems based on Latent Heat of Fusion and Vaporization
3 mins
Setup Of Experiment For Measurement Of Latent Heat Of Vaporization
3 mins
Important Questions
Calculate the heat required to convert
$3kg$
of ice at
$−12_{o}C$
kept in a calorimeter to steam at
$100_{o}$
at atmospheric pressure. (Given: specific heat of ice
$=2.100×10_{5}Jkg_{−1}K_{−1}$
, specific heat of water
$=4.186×10_{6}Jkg_{−1}$
, latent heat of fusion of ice
$=3.35×10_{5}Jkg_{−1}$
and latent heat of steam
$=2.256×10_{6}Jkg_{−1}$
) .
Hard
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>
Latent heat of fusion of ice is:
Easy
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>
For any substance, why does the temperature remain constant during the change of state?
Medium
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>
Calculate the mass of ice required to lower the temperature of
$300g$
of water at
$40°C$
to water at
$0°C$
. (Specific latent heat of ice = 336 J /g, Specific heat capacity of water = 4.2 J/ g°C).
Easy
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>
What is latent heat of fusion ?
Easy
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>
A piece of ice (heat capacity
$=2100Jkg_{−1}$
$_{o}C_{−1}$
and latent heat
$=3.36×10_{5}Jkg_{−1}$
) of mass
$m$
grams is at
$−5_{o}C$
at atmospheric pressure. It is given 420
$J$
of heat so that the ice starts melting. Finally when the ice-water mixture is in equilibrium, it is found that 1 gm of ice has melted. Assuming there is no other heat exchange in the process, the value of m is
Hard
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>
The latent heat of vaporisation of water is:
Medium
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>
A substance of mass m kg requires a power input of P watts to remain in the molten state at its melting point. When the power is turned off, the sample completely solidifies in time t second. What is the latent heat of fusion of the substance?
Medium
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>
How could latent heat be explained from the graph ? Explain in detail.
Medium
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>
$10$
g of ice at
$0_{∘}C$
absorbs
$5460$
J of heat energy to melt and change to water at
$50_{∘}C$
. Calculate the specific latent heat of fusion of ice. Specific heat capacity of water is
$4200Jkg_{−1}K_{−1}$
.
Easy
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>