WorksheetsUnit 3 Practice 2: Specific Heat
Total questions: 20
Worksheet time: 2hrs 30mins
If the same amount of heat is added to each sample, the smallest change in temperature will occur in the
Iron
Dry Air
Granite
Water
A sample of iron receives 50 cal of heat energy that raises the temperature of the iron 25.0°C. If iron has a specific heat of 0.10 cal/g°C, what is the mass of the iron sample?
25 g
30 g
20 g
50 g
The specific heat(c) of copper is 0.39 cal/g °C. What is the temperature change(∆t) when 100 cal of heat(Q) is added to 20 grams?
12.82 °C
24.12°C
351 °C
35.6 °C
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 cal of energy. What is the specific heat of the metal?
1.17 cal/g°C
-1.17 cal/g°C
0.857 cal/g°C
-0.857 cal/g°C
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 1 cal/g•°C.
2100 cal/g°C
10,395 cal/g°C
8295 cal/g°C
1.33 cal/g°C
How many calories of heat are needed to raise the temperature of 10.0 g of aluminum by 33°C, if the specific heat of aluminum is 0.90 ca/g°C?
297 calories
0.003 calories
297 cal/g°C
0.003 cal/g°C
Which of the following would be the best material to use as a conductor because it would heat up and cool down quickly?
Substance A: Cp = 0.46 cal/goC
Substance B: Cp = 1.46 cal/goC
Substance C: Cp = 4.46 cal/goC
Substance D: Cp = 2.46 cal/goC
What must be the specific heat of a 1.50 g piece of metal that absorbs 15.0 calories of heat and experiences a temperature change of 2.10 oC? ROUND TO 3 SIG FIGS.
(a) cal/goC (DO NOT INCLUDE UNITS WHEN TYPING IN ANSWER)
What will be the temperature change of a 13g piece of metal that absorbs 45 calories of heat if the specific heat of the metal is 0.56 cal/goC? ROUND TO 3 SIG FIGS.
(a) °C (DO NOT INCLUDE UNITS WHEN TYPING IN ANSWER)
What must be the mass of a sample of metal if it absorbs 450 calories and it's temperature only rose 3oC. The metal has a Cp of 0.452 cal/goC? ROUND TO 3 SIG FIGS.
(a) g (DO NOT INCLUDE UNITS WHEN TYPING IN ANSWER)
In the formula Q = m Cp ∆T the symbol for specific heat is .......
Cp
Q
m
∆T
If a 3.0 g piece of metal with a specific heat of 0.75 cal/goC absorbs 85 calories what will be the final temperature if the initial temperature is 15.0oC? ROUND TO 3 SIG FIGS.
(a) oC (DO NOT INCLUDE UNITS WHEN TYPING IN ANSWER)
There are four cups of hot cocoa. The cup sizes are shown. The temperature of the cocoa in each cup is 25 degrees celsius. Which cup has the MOST heat?
All three are the same temperature so they have same heat
105 cal
10.5 cal
1.05 cal
50 cal
The specific heat(c) of copper is 0.39 cal/g °C. What is the temperature change(∆t) when 100 cal of heat(Q) is added to 20 grams?
24.12 °C
45.31 °C
Which of the following best explains why the sand at the beach is hotter than the water?
Sand has a higher specific heat than water.
Sand has a lower specific heat than water.
There is more water than sand at the beach.
There is more sand than water at the beach.
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 cal of energy. What is the specific heat of the metal?
1.17 cal/g°C
-1.17 cal/g°C
0.857 cal/g°C
-0.857 cal/g°C
If 100 g of aluminum at 145ºC gains 6,800 cal of heat, what is the final temperature (Tfinal) of the aluminum? Aluminum has a specific heat of 0.897 cal/gºC. (Q=mcΔT)
-69°C
0.52°C
221°C
158°C
