Worksheetsting4 heat
Total questions: 15
Worksheet time: 56mins
Name
Class
Date
1.
What is the formula to calculate heat energy required to raise the temperature of any substance?
a)
Q = m Cp ∆T
b)
Q = m Cp
c)
Q = ½ m v
d)
m = Q Cp
2.
If the specific heat of water is 4,186 J/kg∙°C, how much heat is required to increase the temperature of 1.2 kg of water from 23 °C to 39 °C?
a)
-80,371.2 J
b)
44,938.6 J
c)
80,371.2 J
d)
112,575.9 K
3.
What would be the effect on the particles if more heat is supplied to the system?
a)
They would slow down
b)
They would stop moving
c)
They would speed up
d)
There would be no effect
4.
A sample of iron receives 50.J of heat energy that raises the temperature of the iron 25.0°C. If iron has a specific heat of 0.10 J/g°C, what is the mass of the iron sample?
a)
25 g
b)
30 g
c)
20 g
d)
50 g
5.
Using the heat equation, what would the formula look like if we were solving for change in temperature?
a)
Q m = ∆T Cp
b)
Q / (m Cp) = ∆T
c)
Q m / Cp = ∆T
d)
m c Q = ∆T
6.
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
7.
What is the symbol for Thermal Energy?
a)
Q
b)
T
c)
m
d)
Cp
8.
The symbol for specific heat is .......
a)
Cp
b)
Q
c)
m
d)
T
9.
What unit do you use to measure Thermal Energy?
a)
J/Kg ºC
b)
Kg
c)
ºC
d)
J
10.
Water has a specific heat of 4184 J/KgºC. Wood has a specific heat of 1760 J/KgºC. What material needs more energy to raise the temperature 1ºC
a)
Wood
b)
Water
c)
Both are the same
11.
A high specific heat means...
a)
It heats up quickly with energy added
b)
It requires more energy to change temperature
12.
If I heat up 2 pans of water one has 100 mL in it and one has 1000mL. Which one heats up the fastest?
a)
100 mL
b)
1000 mL
c)
They both heat up at the same speed
d)
They cool down.
13.
You have 20 g of water with specific heat of 4.18 J/g°C. The 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
14.
Calculate the heat absorbed by 105.0 grams of water when it is heated to cook spaghetti. The initial temperature of the water is 20.0°C, and the final temperature of the water is 99.0°C. The specific heat of water is 4.18 J/g•°C.
a)
8778 J/g°C
b)
0.0005 J/g°C
c)
34673 J/g°C
d)
43451.1 J/g°C
15.
The temperature of an unknown piece of metal with a mass of 30.00 g changes from 25.0 °C to 35.0 °C when the metal absorbs 350.0 J of energy. What is the specific heat of the metal?
a)
1.17 J/g°C
b)
-1.17 J/g°C
c)
0.857 J/g°C
d)
-0.857 J/g°C
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