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Y10 Energy changes in reactions / profile diagrams

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Last updated 7 months ago
27 questions
Types of reactions and energy changes
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Endothermic and exothermic reactions
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Reaction progress diagrams
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Question 1
1.

Identify the type of change for the following reaction: NaCl(s) + H₂O(l) → NaCl(aq)

Question 2
2.

Identify the type of change for the following reaction: NaOH + HCl → NaCl + H₂O

Question 3
3.

Identify the type of change for each of the following reaction:

Cl₂ + 2NaBr → 2NaCl + Br₂

Question 4
4.

Identify the type of change for each of the following reaction:

Fe + CuSO₄ → FeSO₄ + Cu

Question 5
5.

Identify the type of change for each of the following reaction:

AgNO₃(aq) NaCl(aq) → NaNO₃(aq) + AgCl(s)

Question 6
6.

In an exothermic reaction, heat energy is:

Question 7
7.

In an endothermic reaction, heat energy is:

Question 8
8.

Bond breaking is:

Question 9
9.

Bond forming is:

Question 10
10.

In an exothermic reaction:

Question 11
11.

In an endothermic reaction:

Question 12
12.
What is the minimum energy needed to break the bonds in the reactants called? Answer: _______ energy (10 letters) (1 Point)
Question 13
13.
This is a reaction profile diagram for an _______________ reaction.
Methane is oxidised to from methanol.

This is a _______________ reaction.
The surroundings will get ___________ as the temperature ______________
Other Answer Choices:
increases
combustion
displacement
neutralisation
exothermic
hotter
precipitation
colder
endothermic
decreases
Question 14
14.

Which letter represents the activation energy during respiration?

Question 15
15.

Which letter represents the overall energy change? (1 Point)

Question 16
16.

Which letter represents the energy change for breaking bonds? (1 Point)

Question 17
17.

Which letter represents the energy change for making bonds?
Note if you were asked to draw an arrow for the energy released when bonds were made in the products the arrow should point downwards

Question 18
18.
This energy change is _______ (1 Point). (endothermic of exothermic)?

Question 19
19.

In this change, the surroundings would get: (1 Point)

Question 20
20.

In this change, the temperature of the surroundings would:

Question 21
21.

The reaction profile shows an ______________ reaction.

Question 22
22.

Which letter represents the activation energy?


Question 23
23.

Which letter represents the energy needed to break the bonds in the reactants? A, B, or C? (1 Point)

Question 24
24.

Which letter represents the energy needed to form the bonds in the products? (1 Point)
Note this arrow should be pointing downwards

Question 25
25.

Which letter represents the energy change for the reaction? (1 Point)

Question 26
26.

The temperature of the surroundings will:

Question 27
27.

Which statement is correct?