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WorksheetsCalorimetry
Total questions: 15
Worksheet time: 9mins
The weather becomes mild during a snow storm because:
one kilogram of ice on melting absorbs 336000 joules of heat energy from surroundings.
one kilogram of water on freezing at 0o C releases 336000 joules of heat energy to the surroundings.
one kilogram of water on freezing at 0 C releases 223000 joules of heat energy to the surroundings.
one kilogram of ice on melting absorbs 223000 joules of heat energy from surroundings.
Which of the following statements are correct ? 1) The boiling point of a liquid decreases with the increase in pressure and increases with the decrease in pressure 2) The boiling point of a liquid decreases by the addition of impurities to it. 3) The melting point of a substance decreases by the presence of impurities in it. 4) The melting point of the substances which contract on melting (like ice) decreases by the increase in pressure.
Only 1
both 3 and 4
all are correct
only 2
When ice melts, its temperature:
remains constant
increases
decreases
changes
The quantity of heat energy required to raise the temperature of a body depends on :
mass of the body
nature of material of the body
rise in temperature of the body
all of the above
The changing from solid to vapour directly at a constant temperature is called :
condensation
regelation
vapourisation
sublimation
The specific latent heat of fusion of water is :
80 cal/g
2260 J/g
80 J/g
336 J/Kg
Plants are protected from wilting during summer due to:
high specific latent heat of vaporisation of water
low specific latent heat of vaporisation of water
high specific heat capacity of water
low specific heat capacity of water
Write the approximate value of specific heat capacity of water in S.I unit.
4200 J kg-1K-1
4.2 J kg-1K-1
4200 cal oC-1gm-1
4.2 cal oC-1kg-1
Icebergs are carried by ocean currents over very long distances due to:
high specific heat capacity of water
high specific latent heat of vapourisation of water
high specific latent heat of fusion of ice
low specific latent heat of fusion of ice
How much heat energy is required to melt 5 kg of ice? Specific latent heat of ice = 336 J/g.
168 J
1.68 x 103 J
16.8 x 103 J
1.68 x 106 J
When the temperature of a substance increases, what happens to the speed of the molecules?
stays the same
increases
decreases
not measureable
Same amount of heat is supplied to two liquids A and B. The liquid A shows a greater rise in temperature. What can you say about the heat capacity of A as compared to that of B?
Heat capacity of A is less than that of B.
Heat capacity of B is less than that of A.
Heat capacity of A and B are same.
Given data is insufficient to predict heat capacity.
Calculate the amount of heat required to convert 450 g of water at 100o C to steam at the same temperature (Latent heat of vapourisation of water = 22.68 x 105 J/kg).
10.206 x 103 J
10.206 x 104 J
10.206 x 105 J
10.206 x 106 J
An iron ball requires 5000 J heat energy to raise its temperature by 100C. Calculate the heat capacity of the iron ball.
5 JK-1
50 JK-1
500 JK-1
5000 JK-1
Steam is used in nuclear power plant because of its:
high latent heat of vapourisation
high specific heat capacity
low latent heat of vapourisation
low specific heat capacity
