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WorksheetsSpecific Latent Heat and Specific Heat Capacity Year 11
Total questions: 14
Worksheet time: 32mins
The graph shows the cooling curve of a substance. At which stages the specific latent heat released?
AB and CD
BC and DE
AB and EF
BC and CD
Calculate the energy absorbed by 30 g of 100 ⁰C water that is turned into 100 ⁰C.
67 800 J
6 7800 J
678 J
67.8 J
Water molecules have the greatest kinetic energy in
Ice at 0 ⁰C
Water at 90 ⁰C
Water at 373 K
Steam at 150 ⁰C
specific latent heat of vaporisation is
the amount of heat required to change 1 kg of the substance from the solid to liquid phase without change in temperature
the amount of heat required to change 1 kg of the substance from the liquid to gaseous phase without change in temperature
the amount of heat required to change the temperature 1 kg of the substance by 1 degree Celcius
The amount of heat required to change the phase of a substance depends on two factors which are
surrounding temperature
temperature change
material
the mass
Latent heat is
the heat absorbed or released at a boiling process during a change of phase
the heat absorbed or released at a constant temperature during a change of phase
the heat absorbed or released at a constant temperature during a change of phase of 1 kg object
the heat absorbed or released by an object to increase or decrease its temperature by 1 degree Celcius
The specific heat of platinum is 0.133 J/g°C. How much heat(Q) is released when a 10 g piece of platinum cools from 100°C to 50°C?
66.5 J
665 J
0.0266 J
0.665 J
20 g of water. specific heat of water is 4.18 J/g°C. temperature changes from 25° C to 20° C, how much heat energy (Q) moves from the water to the surroundings?
418 J
209 J
83 J
4.18 J
The specific heat(c) of copper is 0.39 J/g °C. What is the temperature change(∆t) when 100 Joules of heat(Q) is added to 20 grams?
12.82 °C
24.12°C
1.95 °C
5128 °C
Find the energy released by 0.3 kg of a liquid sample at 200oC to change to its solid state at 50oC. Given that the specific heat capacity of the sample in solid state and liquid state are 770 J kg-1 oC-1 and 900 J kg-1 oC-1 respectively.
The melting point of the sample is 100oC and the specific latent heat of fusion of it is 10 kJ kg-1.
4.17 x 103 J
8.86 x 103 J
2.10 x 104 J
4.16 x 104 J
If 5.0 x 105 J of energy is absorbed by a block of ice when it is heated from -5oC to 0oC, find the mass of the ice.
Given that the specific heat capacity of ice is 2.05 x 103 J kg-1 oC-1 and the specific latent heat of fusion of ice is 3.34 x 105 J kg-1.
1.45 kg
2.56 kg
3.01 kg
3.27 kg
How much energy is required to freeze 150 g of water?
[lv=2260000 J kg−1; lf=334000 J kg−1]
50 100 cal
339 000 J
339 000 cal
50 100 J
How much energy is required to change 5 kg of ice at 0 ° C into water at the same temperature? (latent heat of fusion is 3.36 X 106 J/kg )
16.1 X 106 J
16.8 X 106 J
15.1 X 106 cal
16.8 X 106 cal
