Curriculum
Course: Alhussan Chemistry — Stage 8
Login

Curriculum

Alhussan Chemistry — Stage 8

Chapter 7: Inside Atoms

0/19

Chapter 8: Pure Substances and Solutions

0/35

Chapter 9: Chemical Reactions 2

0/43
Quiz

Chemistry 9.3 Energy changes — Quiz

Submit quiz
Once you submit, you will no longer be able to change your answers. Are you sure you want to submit the quiz?
Cancel Submit
  • Questions count: 50
  • Passing grade: B+
Start Quiz
1.
Temperature of a cold pack. Which graph shows these results correctly?
Dr Dabour Hub Academy - figure 1
A
B
C
D
2.
Which statement is correct?
Energy is destroyed in reactions.
Photosynthesis is exothermic.
Bond breaking releases energy.
Thermal decomposition is usually endothermic.
3.
Temperature went from 21 to 4 °C. Change?
−17°C
17°C
4°C
25°C
4.
Temperature went from 20 to 35 °C. Change?
15°C
35°C
55°C
−15°C
5.
Which term matches this definition? “Substance burnt to release energy.”
Bond breaking
Fuel
Word equation
Irreversible
6.
Which statement is correct?
Energy is destroyed in reactions.
Photosynthesis is exothermic.
Thermal decomposition gives out heat.
Sports cold packs use endothermic processes.
7.
Temperature of a cold pack. At what value of "Time (min)" is "Temperature (°C)" greatest?
Dr Dabour Hub Academy - figure 2
2
0
1
5
8.
True or false? Energy is destroyed in reactions.
True
False
9.
Temperature went from 20 to 52 °C. Change?
32°C
72°C
−32°C
52°C
10.
Thermal decomposition is usually ____.
exothermic
physical
instant
endothermic
11.
Temperature change is measured with a ____.
balance
clock
thermometer
ruler
12.
Which is the correct definition of “Exothermic”?
Releases energy to the surroundings.
Food type releasing most energy per gram.
Everything around the reacting chemicals.
Substance burnt to release energy.
13.
Energy = 4.2 × mass of water × temperature rise. Energy for 200 g water rising 20 °C?
16,800 J
4000 J
84 J
840 J
14.
Which is the correct definition of “Endothermic”?
Takes in energy from the surroundings.
Rock of calcium carbonate.
Food type such as bread and rice.
Everything around the reacting chemicals.
15.
Energy to break and made by bonds (kJ). What is the value for Breaking bonds?
Dr Dabour Hub Academy - figure 3
3460
1328
5302
2650
16.
Temperature of a hand warmer. Which graph shows these results correctly?
Dr Dabour Hub Academy - figure 4
A
B
C
D
17.
Temperature of a hand warmer. Which graph shows these results correctly?
Dr Dabour Hub Academy - figure 5
A
B
C
D
18.
Temperature of a cold pack. Calculate the percentage change in "Temperature (°C)" from 0 to 5.
Dr Dabour Hub Academy - figure 6
−162%
38%
62%
−62%
19.
Energy = 4.2 × mass of water × temperature rise. Energy for 50 g water rising 5 °C?
210 J
250 J
1050 J
21 J
20.
Temperature of a hand warmer. Which graph shows these results correctly?
Dr Dabour Hub Academy - figure 7
A
B
C
D
21.
Temperature of a cold pack. Which graph shows these results correctly?
Dr Dabour Hub Academy - figure 8
A
B
C
D
22.
Combustion is ____.
exothermic
endothermic
physical
neutral
23.
Which statement is correct?
A polystyrene cup reduces heat loss.
Neutralisation cools the solution.
Exothermic products have more energy.
Bond breaking releases energy.
24.
Which is the correct definition of “Cold pack”?
Uses an endothermic process.
Everything around the reacting chemicals.
Only one variable changed.
Energy escaping to the air.
25.
Temperature went from 21 to 35 °C. Change?
−14°C
14°C
56°C
35°C
26.
Breaking bonds needs 2650 kJ; making bonds releases 2400 kJ. Overall energy released?
5050 kJ
2400 kJ
−250 kJ
250 kJ
27.
Which term matches this definition? “Releases energy to the surroundings.”
Irreversible
Complete combustion
Exothermic
Kilojoule
28.
Temperature of a cold pack. Which graph shows these results correctly?
Dr Dabour Hub Academy - figure 9
A
B
C
D
29.
Energy = 4.2 × mass of water × temperature rise. Energy for 100 g water rising 5 °C?
21 J
500 J
2100 J
420 J
30.
True or false? Self-heating cans use exothermic reactions.
True
False
31.
Which is the correct definition of “Energy level diagram”?
Container used to hold water above a burner.
Gas from combustion and decomposition.
Releasing energy from food in cells.
Shows energy of reactants and products.
32.
Which is the correct definition of “Hand warmer”?
Apparatus for measuring energy.
Releases energy (exothermic).
Uses an exothermic reaction.
Container used to hold water above a burner.
33.
Temperature went from 21 to 52 °C. Change?
31°C
73°C
52°C
−31°C
34.
Temperature of a hand warmer. What is the value of "Temperature (°C)" when "Time (min)" is 2?
Dr Dabour Hub Academy - figure 10
73
74
57
30
35.
Hand warmers use ____ reactions.
nuclear
endothermic
exothermic
physical
36.
Temperature during an exothermic reaction. Which graph is correct?
Dr Dabour Hub Academy - figure 11
A
B
C
D
37.
Which term matches this definition? “Releases energy (exothermic).”
Bond making
Carbon monoxide
Ethanol
Spirit burner
38.
Temperature went from 21 to 8 °C. Change?
−13°C
8°C
29°C
13°C
39.
Neutralisation is ____.
exothermic
physical
nuclear
endothermic
40.
Respiration is ____.
endothermic
reversible
exothermic
physical
41.
Temperature of a cold pack. Which graph shows these results correctly?
Dr Dabour Hub Academy - figure 12
A
B
C
D
42.
Temperature change in four reactions. Which graph shows these results correctly?
Dr Dabour Hub Academy - figure 13
A
B
C
D
43.
Endothermic reactions make the surroundings ____.
colder
louder
brighter
hotter
44.
Temperature of a hand warmer. Which statement best describes the pattern?
Dr Dabour Hub Academy - figure 14
"Temperature (°C)" increases as "Time (min)" increases
"Temperature (°C)" rises to a peak at 4, then falls
"Temperature (°C)" stays the same
"Temperature (°C)" decreases as "Time (min)" increases
45.
Which statement is NOT correct?
Endothermic reactions make the surroundings colder.
In endothermic reactions products have more energy than reactants.
Bond breaking releases energy.
Energy is transferred between chemicals and the surroundings.
46.
Which statement is correct?
Making bonds needs energy.
Hand warmers use exothermic reactions.
Energy is destroyed in reactions.
Exothermic products have more energy.
47.
Temperature of a hand warmer. Which graph shows these results correctly?
Dr Dabour Hub Academy - figure 15
A
B
C
D
48.
Temperature went from 20 to 4 °C. Change?
4°C
16°C
24°C
−16°C
49.
Burning fuels transfers ____.
energy
mass
colour
atoms
50.
Which statement is NOT correct?
Exothermic products have more energy.
Endothermic reactions make the surroundings colder.
Combustion is exothermic.
Neutralisation is exothermic.
  • 1
  • 2
  • 3
  • 4
  • 5
  • 6
  • 7
  • 8
  • 9
  • 10
  • 11
  • 12
  • 13
  • 14
  • 15
  • 16
  • 17
  • 18
  • 19
  • 20
  • 21
  • 22
  • 23
  • 24
  • 25
  • 26
  • 27
  • 28
  • 29
  • 30
  • 31
  • 32
  • 33
  • 34
  • 35
  • 36
  • 37
  • 38
  • 39
  • 40
  • 41
  • 42
  • 43
  • 44
  • 45
  • 46
  • 47
  • 48
  • 49
  • 50
Part of Chapter 9: Chemical Reactions 2 — see every lesson and quiz in this unit.
Accepted payment methods