WorksheetsB1: specific heat capacity and latent heat
Total questions: 20
Worksheet time: 47mins
Danny pours some 95°C water into a cup of instant noodles. The final temperature of the mixture is 85°C. If the masses of the hot water and noodles are 500 g and 150 g respectively, find the specific heat capacity of the noodles.
Give that the original temperature of the noodles is 25°C and the specific heat capacity of the water is 4200 J kg-1 °C-1.
500 J kg-1 °C-1
1.08 x 103 J kg-1 °C-1
2.33 x 103 J kg-1 °C-1
6.00 x 103 J kg-1 °C-1
When an electric heater is supplied with an electric power of 2.0 kW to heat 4.0 kg of water for 1 minute, calculate the increase in temperature of the water. Assume that the specific heat capacity of water is 4200 J kg-1 0C-1 and there is no heat loss to the surroundings.
3.050C
7.10C
140C
300C
Which will heat up faster?
copper
granite
iron
basalt
Which will heat up slower?
water
lead
granite
iron
Calorimetry Question:
A piece of metal with a mass of 32.8 g is heated to 100.5°C and dropped into 138.2 g of water at 20.0°C. The final temperature of the system is 30.2°C. What is the specific heat capacity of the metal?
2.56 J/g°C
0.391 J/g°C
5.29 J/g°C
3.50 J/g°C
A 300g piece of aluminum at 100 oC is placed in a 150g of H2O at 20.0 oC. The final temp. of the mix is 35 oC. What is the specific heat of the aluminum if the specific heat of the water is 4180 J/kgK?
482 J
482 g
What is the formula to calculate specific latent heat of vaporisation?
l=mQ
c = Q/(mΔƟ)
Q = mcΔƟ
Q=ml
if 334000 J of heat is required to change state of 1 kg of ice into water then heat of fusion is
668000 J/kg
334000 kg
334000 J/kg
668000 J
which value is larger for a substance
latent heat of fusion
latent heat of vaporisation
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
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 x106J
16.8 X106J
15.1 X106cal
16.8 X106cal
How much energy is required to change 2600 g of water at 100 ° C into steam temperature? (latent heat of vaporization is 2.26 x 106 )
Q = 5.9 X 106 J
M = 5.9 Xundefined J
C = 5.9 Xundefined J
Δ T = 5.9 X J
The specific latent heat released at stages?
10 kg of aluminium is heated from 120C to 220C. How much energy is needed?
8 970 000 J
897 J
8970 J
89 700 J
897 000J
The definition for specific heat capacity is
Specific heat capacity is the amount of power needed to raise the temperature of unit mass of a substance by 1K/1oC
Specific heat capacity is the amount of energy needed to raise the temperature of unit mass of a substance by 1K/1oC
Specific heat capacity is the amount of energy needed to raise the temperature by 1K/1oC
Specific heat capacity is the amount of power needed to raise the temperature by 1K/1oC
Define specific latent heat of vaporisation.
The specific latent heat of a substance tells us how much energy is needed to change the state of 1 kg of substance at constant temperature.
The specific latent heat of a substance tells us how much energy is needed to change the state of 1 kg of substance
The specific latent heat of a substance tells us how much energy is needed to change the state between a solid and liquid of 1 kg of substance at constant temperature.
The specific latent heat of a substance tells us how much energy is needed to change the state between a liquid and gas of 1 kg of substance at constant temperature.
