The equation 6CO2(g) + 6H2O(l) ↔ C6H12O6(aq) + 6O2(g) represents:

Photosynthesis, which is an endothermic reaction

Entropy decreases when the equation shows:

A decrease in the number of moles of gas

A catalyst can change the rate of a chemical reaction. Which of the following cannot be achieved by a catalyst?

Increase the yield for a reaction

The diagram illustrates:

A bomb calorimeter suitable to study combustion

When an exothermic reaction is studied in a calorimeter:

Released from the reactants into the surroundings

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Chemistry Module 4

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Questions 12

Answers

1
The equation 6CO_2(g) + 6H₂O_(l) ↔ C₆H₁₂O_6(aq)+ 6O_2(g)represents:
Photosynthesis, which is an exothermic reaction
Respiration, which is an endothermic reaction
Respiration, which is an exothermic reaction
Photosynthesis, which is an endothermic reaction
2
Entropy decreases when the equation shows:
An increase in the number of moles of solids
An increase in the number of moles of gas
A decrease in the number of moles of gas
A liquid or solid dissolving in a solvent
3
A catalyst can change the rate of a chemical reaction. Which of the following cannot be achieved by a catalyst?
Provide a surface on which a reaction occurs
Temporarily combine with a reactant to form a chemical intermediate
Provide an alternate pathway
Increase the yield for a reaction
4
A chemical reaction can never be spontaneous when:Δ
Any chemical reaction can be spontaneous if the temperature is high enough
Both ΔS and ΔH are > 0
ΔG < 0
ΔG > 0
5
In the following image what us the activation energy?
A
A + B
B
C
6
When water changes state from solid to liquid to gas, the entropy:
Decreases and then increases
Increases
Stays the same
Decreases
7
Which temperature is the highest in this graph?
T2
T1
8
The diagram illustrates:
A calorimeter suitable to study solution chemistry
A bomb calorimeter suitable to study combustion
A spirit burner
An instrument used to measure entropy
9
Which statement related to bond energy is true?
Double bonds have higher energy than single bonds between the same elements
All of the above
A strong bond is a stable bond
The shorter the bond, the higher its energy
10
When ionic compounds such as sodium chloride dissolve in water, the ions:
Dissociate
Disintegrate
Escape from the solution
Form a crystal lattice
11
Water is useful in calorimeters mainly because:
It has a high specific heat
It is a universal solvent
It flows readily
It has a low specific heat
12
When an exothermic reaction is studied in a calorimeter:
Absorbed from the surroundings
Released from the breaking of bonds
Released from the reactants into the surroundings
Cannot be accurately measured

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