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Worksheets16 Heat
Total questions: 10
Worksheet time: 26mins
Name
Class
Date
1.
A sample of iron receives 50.J of heat energy that raises the temperature of the iron by 25.0°C. If iron has a specific heat of 0.10 J/g°C, what is the mass of the iron sample? (show your work)
a)
25g
b)
30g
c)
20g
d)
50g
2.
For the formula:
Q= m c ∆T
The units for specific heat are:
Q= m c ∆T
The units for specific heat are:
a)
g /J C
b)
°C/g J
c)
kJ/g
d)
J/g°C
3.
What is energy?
a)
the ability to do work
b)
how much power a system has.
c)
the flow of heat
d)
how awake a person feels
4.
If I have 2 blocks of Aluminium (one of 1kg and one of 10 kg) and heat them up.
Which one heats up the fastest.
Which one heats up the fastest.
a)
1 kg
b)
10 kg
c)
They both heat up at the same speed
d)
They don't heat up.
5.
A pot of 2400g of water at a temperature of 25˚C is heated on a stove until the water boils (100˚C). The specific heat of water is 4.18 J/(g˚C).
Determine the heat energy needed to heat the water in the pot to boiling.
Determine the heat energy needed to heat the water in the pot to boiling.
a)
133.76J
b)
43,062.2J
c)
752,400J
d)
1,003,200J
6.
Copper, Stainless Steel, Carbon Steel, and Zinc were all heated using the same thermal energy. What material would be the coolest after being heated?
a)
Copper
b)
Carbon Steel
c)
Zinc
d)
Stainless Steel
7.
How many Joules of energy are required to change 10 gram of water from 20 C to 90 C?
a)
1400 J
b)
2800 J
c)
210,000 J
d)
1,400,000 J
8.
A 9.5 kg outdoor copper structure heats up during the day from 24 degrees C to 78 degrees C. How much energy was absorbed? Note: copper has a specific heat of 390 J/kg C
a)
100,000 J
b)
247,000 J
c)
200,070 J
d)
235,000 J
9.
How much heat is required to completely change 5.3 g of water from solid to liquid?
a)
334 J/g
b)
1770 J
c)
63 J
d)
1800 J
10.
How much heat is required to change 10.2 g of water from -11.2OC to 53.4OC?
a)
27.5 kJ
b)
59,178 J
c)
5,920 J
d)
2,750 J
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