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Alhussan Chemistry — Stage 8

Chapter 7: Inside Atoms

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Chapter 8: Pure Substances and Solutions

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Chapter 9: Chemical Reactions 2

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Chemistry 9.4 Investigating fuels — Quiz

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  • Questions count: 50
  • Passing grade: B+
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1.
Temperature of water heated by ethanol. Which graph shows these results correctly?
Dr Dabour Hub Academy - figure 1
A
B
C
D
2.
Which is a control variable?
Temperature change
Volume of water
Type of fuel
Colour of flame
3.
Which term matches this definition? “Small lamp that burns liquid fuel.”
Spirit burner
Copper can
Bond breaking
Salt
4.
Stir the water to spread ____ evenly.
soot
heat
air
fuel
5.
True or false? Distance from flame to can can vary.
True
False
6.
Which statement is correct?
Burn the same mass of each fuel.
Measured values are higher than true.
All fuels release the same energy per gram.
Draught shields increase heat loss.
7.
Mass of spirit burner during heating. By how much does "Mass (g)" change between 0 and 5?
Dr Dabour Hub Academy - figure 2
298.0
3.0
2.0
148.0
8.
Energy = 4.2 × 200 g × 33 °C. Energy released?
139 J
840 J
6600 J
27,720 J
9.
Which term matches this definition? “Energy escaping to the air.”
Nitrate
Quicklime
Carbon dioxide
Heat loss
10.
Which statement is correct?
A draught shield reduces heat loss.
Hydrogen produces CO2.
Methanol releases more energy than butanol.
All fuels release the same energy per gram.
11.
Which statement is NOT correct?
Keep the distance from flame to can the same.
Combustion is endothermic.
Energy = 4.2 × mass of water × temperature rise.
Hydrogen burns to make only water.
12.
The burner went from 150.0 g to 148.0 g. Mass of fuel burnt?
150.0 g
148.0 g
298.0 g
2.0 g
13.
12600 J was released by burning 1.5 g of fuel. Energy per gram in kJ?
84.0 kJ/g
18.9 kJ/g
8.4 kJ/g
8400.0 kJ/g
14.
Common fuels include methane, ethanol and ____.
helium
hydrogen
neon
argon
15.
Temperature rise of 100 g water from 1 g of fuel. What is the value for Propanol?
Dr Dabour Hub Academy - figure 3
35
30
22
33
16.
Temperature of water heated by ethanol. Which graph shows these results correctly?
Dr Dabour Hub Academy - figure 4
A
B
C
D
17.
Temperature of water heated by ethanol. Which graph shows these results correctly?
Dr Dabour Hub Academy - figure 5
A
B
C
D
18.
Temperature of water heated by ethanol. Which graph shows these results correctly?
Dr Dabour Hub Academy - figure 6
A
B
C
D
19.
In a fuel investigation, what is the dependent variable?
Temperature change of the water
Mass of fuel
Type of fuel
Volume of water
20.
True or false? Combustion is an exothermic reaction.
True
False
21.
Energy = 4.2 × 100 g × 35 °C. Energy released?
14,700 J
3500 J
147 J
420 J
22.
Temperature rise is the ____ variable.
independent
random
control
dependent
23.
Which term matches this definition? “Burning a fuel in oxygen, transferring stored chemical energy.”
Distillation
Neutralisation
Combustion
Decomposition
24.
Which is the correct definition of “Calorimetry”?
Energy is never created or destroyed.
Gas made when metals react with acids.
Measuring energy by heating water.
Salt from nitric acid.
25.
Energy = 4.2 × 200 g × 30 °C. Energy released?
6000 J
25,200 J
840 J
126 J
26.
Which is the correct definition of “Fair test”?
Starting substance, written on the left.
Only one variable changed.
Toxic gas from incomplete combustion.
Energy is never created or destroyed.
27.
Which is the correct definition of “Methane”?
Salt from hydrochloric acid.
Starting substance, written on the left.
Burning with plenty of oxygen.
Main gas in natural gas.
28.
True or false? Fuel type is the independent variable.
True
False
29.
True or false? "Which fuel is best?" can be answered by one fair test.
True
False
30.
Which statement is NOT correct?
A copper can conducts heat well.
Stir the water to spread heat evenly.
Soot shows complete combustion.
Temperature rise is the dependent variable.
31.
Temperature of water heated by ethanol. By how much does "Temperature (°C)" change between 0 and 5?
Dr Dabour Hub Academy - figure 7
58
30
24
41
32.
Keep the distance from flame to can the ____.
zero
different
same
random
33.
Use a lid to reduce ____.
heat loss
volume
mass
light
34.
Temperature of water heated by ethanol. Which graph shows these results correctly?
Dr Dabour Hub Academy - figure 8
A
B
C
D
35.
Larger alcohol molecules release ____ energy per gram.
no
equal
less
more
36.
Which is the correct definition of “Ethanol”?
Alcohol fuel used in spirit burners.
Apparatus for measuring energy.
Shows energy of reactants and products.
Measuring energy by heating water.
37.
Burn the same ____ of each fuel.
shape
colour
smell
mass
38.
Hydrogen burns to make only ____.
soot
ash
water
CO2
39.
Temperature rise of 100 g water from 1 g of fuel. Which has the greatest value?
Dr Dabour Hub Academy - figure 9
Butanol
Methanol
Ethanol
Propanol
40.
Temperature of water heated by ethanol. Calculate the percentage change in "Temperature (°C)" from 0 to 5.
Dr Dabour Hub Academy - figure 10
59%
−141%
241%
141%
41.
Why must the same mass of each fuel be burned?
To compare energy fairly
It does not matter
To save fuel
To make the fuels burn faster
42.
Measured 12 kJ/g; true value 30 kJ/g. Percentage error?
150%
60%
18%
40%
43.
True or false? Temperature rise is the dependent variable.
True
False
44.
Which statement is correct?
Distance from flame to can can vary.
Soot on the can shows incomplete combustion.
Measured values are higher than true.
Hydrogen produces CO2.
45.
True or false? All fuels release the same energy per gram.
True
False
46.
Measured 14 kJ/g; true value 30 kJ/g. Percentage error?
47%
16%
114%
53%
47.
True or false? Draught shields increase heat loss.
True
False
48.
Which term matches this definition? “Unit of energy (J).”
Limestone
Incomplete combustion
Joule
Nitrate
49.
Temperature of water heated by ethanol. Which graph shows these results correctly?
Dr Dabour Hub Academy - figure 11
A
B
C
D
50.
Which statement is NOT correct?
Fuel type is the independent variable.
Weigh the burner only before burning.
Butanol releases more energy per gram than methanol.
Heat a fixed amount of water.
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Part of Chapter 9: Chemical Reactions 2 — see every lesson and quiz in this unit.
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