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WorksheetsTOPIC: HEAT
Total questions: 50
Worksheet time: 50mins
Name
Class
Date
1.
True or false: Heat moves from the cooler object to a warmer object
a)
True
b)
False
2.
If two objects have different temperatures, heat will flow from the warmer object to the cooler one UNTIL ____________
a)
one reaches a temperature of zero
b)
they both have an equal temperature
c)
one runs out of energy
3.
Heat always transfers from hot to cold.
a)
True
b)
False
4.
The transfer of thermal energy between objects of different temperatures is called...
a)
temperature
b)
heat
c)
internal energy
d)
none of these
5.
True/False: when two substances reach the same temperature they are in thermal equilibrium.
a)
True
b)
False
6.
Temperature is a measure of the...
a)
total energy in a substance
b)
total kinetic energy in a substance
c)
average potential energy in a substance
d)
average kinetic energy of molecules in a substance
7.
Freezing occurs when matter changes from a...
a)
gas to a solid
b)
solid to a gas
c)
liquid to a gas
d)
liquid to a solid
8.
High temperature is connected to:
a)
Low kinetic energy.
b)
High kinetic energy.
c)
Zero net energy.
d)
Equal kinetic energies.
9.
What letter represents heat?
a)
S
b)
C
c)
T
d)
Q
10.
What is 0oC in Kelvin?
a)
110 K
b)
100 K
c)
273 K
d)
210 K
11.
How much heat is absorbed when 355g of water goes from 25-45 degrees Celsius? The specific heat of water is 4180 J/kg.K
a)
21945 J
b)
21945 g
c)
29678 J
d)
29678 g
12.
Polystyrene is a good heat...
a)
emitter
b)
absorber
c)
conductor
d)
insulator
13.
Which has the higher specific heat capacity, water or sand?
a)
water
b)
sand
c)
they are both equal
14.
To convert from Celsius to Kelvin:
K = Degrees Celsius + __________
K = Degrees Celsius + __________
a)
251 K
b)
275 K
c)
213 K
d)
273 K
15.
Recall the equation to calculate the change in heat (Thermal Energy) of an equation:
∆Q = mc∆T
If
∆Q = 100 J
m = 10 g
∆T = 2 °C
What is c (in J/kgK) ?
∆Q = mc∆T
If
∆Q = 100 J
m = 10 g
∆T = 2 °C
What is c (in J/kgK) ?
a)
20
b)
5
c)
25
d)
200
16.
12 kilograms = ___ grams
a)
1000
b)
12000
c)
12
d)
120
17.
The following number in scientific notation is
0.0005621 = _____
0.0005621 = _____
a)
5.621 x 104
b)
5.621 x 10-5
c)
5.621 x 10-4
d)
56.21 x 102
18.
Can heat be created or destroyed?
a)
Yes
b)
No
c)
Only when things are cooling off
d)
Only when things are warming up
19.
When things are hot molecules are moving...
a)
Fast
b)
Slow
c)
They are not moving
d)
They are moving by not fast or slow
20.
When things are cold molecules are moving...
a)
Fast
b)
Slow
c)
They are not moving
d)
They are moving by not fast or slow
21.
Everything has heat
a)
True
b)
False
22.
Heat that is transferred because of touching is called...
a)
Radiation
b)
Conduction
c)
Convection
d)
Reflection
23.
Heat and Temperature are the same thing
a)
True
b)
False
24.
Energy that does NOT need a medium to transfer heat is called...
a)
Radiation
b)
Conduction
c)
Convection
d)
Reflection
25.
Energy that does need a medium (usually air or water) to transfer heat is called...
a)
Radiation
b)
Conduction
c)
Convection
d)
Reflection
26.
Heat passes from...
a)
High to low
b)
Cold to hot
c)
Hot to cold
d)
Heat cannot be passed
27.
What is an insulator?
a)
Something that does NOT absorb heat very well.
b)
Something that absorbs heat.
28.
What is a conductor?
a)
Something that does NOT absorb heat very well.
b)
Something that absorbs heat.
29.
Diagram above shows milk at temperature 80oC immersed in water at temperature 10oC. Which statement is correct when milk and water eventually achieved thermal equilibrium?
a)
There is no flow of heat between milk and water.
b)
The net flow of heat between milk and water is zero.
c)
The temperature of milk and water will be the same at 10oC.
d)
The temperature of milk and water will be the same at 80oC.
30.
Diagram above shows mercury in glass thermometer found in laboratory. Which of the following is the most suitable modification if the thermometer is to be used for temperature measurement in north pole?
a)
Increase the size of the capillary.
b)
Increase the volume of mercury in the thermometer.
c)
Decrease the volume of mercury in the thermometer.
d)
Replace the mercury with alcohol.
31.
Water in the ice maker of a refrigerator has a mass of 0.4 kg and temperature of 22oC. What is the temperature of the water after 33 600 J of energy has been removed from it?
(Specific heat capacity of water = 4200 J kg-1 oC-1)
(Specific heat capacity of water = 4200 J kg-1 oC-1)
a)
20oC
b)
2oC
c)
0.2oC
d)
22oC
32.
Two cups contain coffee at 85oC and milk at 35oC respectively. The specific heat capacity of milk is 1.5 times the specific heat capacity of coffee. The mass of coffee is twice the mass of milk. If the drinks are mixed together, what is the final temperature of the mixture?
a)
63.57oC
b)
54.26oC
c)
72.34oC
d)
66.28oC
33.
Why water is used as a cooling agent in car engine?
a)
Water has low specific heat capacity.
b)
Water has high specific heat capacity.
c)
Water is denser than oil
d)
Water has low boiling point
34.
Diagram above shows a set up to determine the specific heat capacity of a liquid. Which of the following is the best to explain why the liquid is put in the polystyrene cup?
a)
Polystyrene cup prevent the heat from lost to surrounding.
b)
Polystyrene cup is stable
c)
Polystyrene cup absorb heat better from surrounding.
d)
Polystyrene cup has high melting point.
35.
A steel block of mass 15 kg is dropped vertically from a height of 100 m. What is the increase in the temperature of the steel if all the energy is converted to heat energy?
(Specific heat capacity of steel block = 466 J kg-1 oC-1)
(Specific heat capacity of steel block = 466 J kg-1 oC-1)
a)
21.5oC
b)
2.15oC
c)
0.25oC
d)
25oC
36.
200 g of toluene is heated with an immersion heater rated 1000 W at boiling point 110oC. Determine the time taken to change all the liquid toluene to gas.
(Specific latent heat of vaporization of toluene = 3.51 x 105 J kg-1)
(Specific latent heat of vaporization of toluene = 3.51 x 105 J kg-1)
a)
7.2 s
b)
70.2 s
c)
70 200 s
d)
720 s
37.
After a long journey from Alor Setar to Johor Bahru, a tyre of a car gone flat because of heat produced due to friction with the road. Which gas law is associated to the above phenomenon
a)
Charles' Law
b)
Pressure Law
c)
Boyle's Law
38.
The balloon with initial volume 15 cm3 when immersed in ice water at 2oC expand to a volume V when put into a boiling water at temperature 100oC. Find V
a)
750 cm3
b)
75 cm3
c)
20.3 cm3
d)
23.0 cm3
39.
Dented ping pong ball can be fixed by putting them into hot water. Which law is associated to this phenomenon?
a)
Charles' Law
b)
Boyle's Law
c)
Pressure Law
d)
Sairul's Law
40.
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
41.
A high specific heat means...
a)
It heats up quickly with energy added
b)
It requires more energy to change temperature
42.
What is the correct formula for Boyle's Law?
a)
V1/T1=V2/T2
b)
P1V1=P2V2
c)
P1/T1=P2/T2
d)
PV=nRT
43.
Which variable is held constant when using Boyle's Law?
a)
Temperature
b)
Pressure
c)
Volume
d)
number of moles
44.
Which of the following temperatures is appropriate to convert 25oC into the Kelvin scale?
a)
373K
b)
272K
c)
372K
d)
273K
45.
Gas Laws involve what three terms?
a)
Solid Liquid Gas
b)
Speed Velocity Acceleration
c)
Elements Compounds Mixtures
d)
Pressure Temperature Volume
46.
When the temperature is constant (k) inside a balloon, if you add pressure on it, the volume will .....
a)
Decrease
b)
Increase
c)
Not Change at all
d)
Particles will solidify
47.
What 2 variables are used in a Hot Air Balloon?
[Hint: Space and Heat]
[Hint: Space and Heat]
a)
Pressure and Volume
b)
Volume and Temperature
c)
Temperature and Pressure
d)
Pressure, Temperature and Volume
48.
What is the equation to solve for Boyle's Law?
a)
P1 (P2) = V1 (V2)
b)
P1 (V1) = P2 (V2)
c)
P1 / V1 = P2 / V2
d)
P1-V1 = P2 - V2
49.
What is the equation to solve for Charles' Law?
a)
P1 (P2) = V1 (V2)
b)
V1 / T1 = V2 / T2
c)
P1 / T1 = P2 / T2
d)
V1 / V2 = T1 / T2
50.
What is the equation to solve for Gay Lussac's Law?
a)
P1 (P2) = V1 (V2)
b)
V1 / T1 = V2 / T2
c)
P1 / T1 = P2 / T2
d)
V1 / V2 = T1 / T2
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