Student name:
DTT Booster
Edexcel Science C2
Diagnosis Test – Topic 2.5 – Energy change
Question
Topic
Total Marks
1
Exo / Endo
3
2
Graphs
3
3
Size of change
3
4 - QWC
Energy
experiment
6
My Mark
R
A
G
15
Areas to improve:
Commissioned by The PiXL Club Ltd. February 2016
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Diagnosis test: Edexcel Science Topic 2.5 Energy Change (15 marks)
1.
a) How would you know mixing two solutions together was an exothermic reaction?
A.
The colour would change
B.
The tube would feel cold
C.
The tube would feel warm
D.
You would see bubbling
b) In an endothermic reaction the energy contained in the bonds of the products:
A.
Has increased
B.
Has decreased
C.
You cannot tell without more information
D.
Stayed the same
c) To break a chemical bond:
A.
Energy is released
B.
Energy has to be absorbed
C.
Energy stays the same
D.
Energy is shared between the two atoms released
(3 marks)
2. Complete the energy diagrams to show two reactions, A and B, both are exothermic but reaction B is twice as
exothermic as A.
(3 marks)
1
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3. Calculate the energy absorbed by a copper can containing 200g of water, when a sample of biodiesel is burnt
under it. Give your answer in kJ.
The temperature of the water at the start of the experiment was 20OC and at the end was 32oC
The specific heat capacity of water is 4.2 J/g OC
(3 marks)
4. QWC: A student wants to find out the energy content of the flammable liquid ethanol. Her teacher has given her
a spirit burner containing the ethanol.
Draw a diagram to show how the student should set up the equipment and explain what measurements need to
be made and how she could calculate the energy of the fuel.
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(6 marks)
2
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