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WorksheetsCalculating Heat Using Specific Heat
Total questions: 15
Worksheet time: 45mins
Name
Class
Date
1.
A 15.75-g piece of iron absorbs 1086.75 joules of heat energy, and its temperature changes from 25°C to 175°C. Calculate the specific heat capacity of iron.
a)
0.46 J/gxoC
b)
1.654 J/gxoC
c)
2,567,446.875 J/gxoC
2.
How many joules of heat are needed to raise the temperature of 10.0 g of aluminum from 22°C to 55°C, if the specific heat of aluminum is 0.90 J/gx°C?
a)
297 Joules
b)
0.003 Joules
c)
297 J/gx°C
d)
0.003 J/gx°C
3.
A 0.3 g piece of copper is heated and fashioned into a bracelet. The amount of energy transferred by heat to the copper is 66,300 J. If the specific heat of copper is 390 J/g 0C, what Is the change of the copper's temperature?
a)
566.7 °C
b)
77,571,000 Joules
4.
When a piece of aluminum foil is taken out of the oven and cools from 100° to 50°, What is the change in temperature?
a)
50°
b)
0°
c)
100°
d)
150°
5.
The symbol for specific heat is .......
a)
c
b)
Q
c)
m
d)
t
6.
What is the formula to calculate heat energy required to raise the temperature of any substance?
a)
Q=mc∆t
b)
Q=mc
c)
Q= ½mv
d)
m=QC
7.
Specific heat is....
a)
The measure of kinetic energy of an objects particles
b)
A measure of the energy needed to increase the average kinetic energy of the particles
c)
The heating caused by the motion of flluid due to temperature difference
d)
The transfer of energy by electromagnetic radiation
8.
A high specific heat means...
a)
It heats up quickly with energy added
b)
It requires more energy to change temperature
9.
How many Joules of energy are required to change 10 gram of liquidwater from 20 C to 90 C?
a)
1400 J
b)
2800 J
c)
210,000 J
d)
1,400,000 J
10.
The specific heat of aluminum is 0.21 J/g°C. How much heat(Q) is released when a 10 g piece of aluminum foil is taken out of the oven and cools from 100° to 50°?
a)
105 J
b)
10.5 J
c)
1.05 J
11.
For a skillet, used for cooking, do you want a high or low specific heat
a)
High, so that it will need more energy to heat up
b)
Low, so that it will change temperature quickly
12.
20 g of water. specific heat of water is 4.18 J/x°C. temperature changes from 25° C to 20° C, how much heat energy (Q) moves from the water to the surroundings?
a)
418 Joules
b)
209 J
c)
83 J
d)
4.18 J
13.
If 200 grams of water is to be heated from 24.0° C to 100.0° C to make a cup of tea, what is the mass and what is the change in temperature?
a)
m=200g
∆t= 66
∆t= 66
b)
m=200g
∆t=124
∆t=124
c)
m=200
∆t=100
∆t=100
d)
m=200g
∆t=76
∆t=76
14.
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?
a)
12.82 °C
b)
24.12°C
c)
351 °C
15.
Which of the following is NOT true about heat?
a)
Heat moves from hot to cold
b)
Heat is a form of energy
c)
Heat cannot be transferred
d)
Heat makes molecules speed up
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