Chemical Engineering

Effects of Mixing into Energy Balance

Question 1
Marks : +2 | -2
Pass Ratio : 100%
What is the heat of solution in the energy balance?
Heat of dissolution
Heat of reaction
Heat of formation
None of the mentioned
Explanation:
Heat of solution in the energy balance is the heat of reaction.
Question 2
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What is the heat transferred from 2 mole of the system if the output sensible heat is 3 J/mole, input sensible heat is 2 J/mole, and heat of solution is 2 J/mole?
2 J
3 J
5 J
6 J
Explanation:
Q = ∆Hout,sensible – ∆Hin,sensible + ∆Hsolution = 2*(3 – 2 + 2) = 6 J.
Question 3
Marks : +2 | -2
Pass Ratio : 100%
Which of the following is required for the calculation of heat of reaction in the energy balance?
Heat of solution at reference state
Heat of dissolution at reference state
Heat of formation
All of the mentioned
Explanation:
Heat of solution at reference state, Heat of dissolution at reference state and heat of formation all are required in the calculation of Heat of reaction.
Question 4
Marks : +2 | -2
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What is required in the calculation of heat of reaction in the energy balance of mixing?
Heat of formation
Sensible Heat
Latent heat
All of the mentioned
Explanation:
Heat of formation is required in the calculation of heat of reaction in the energy balance of mixing.
Question 5
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What is the heat transferred from the system if the output sensible heat is 5 J, input sensible heat is 20 J, and heat of solution is 10 J?
-10 J
-5 J
0
10 J
Explanation:
Q = ∆Hout,sensible – ∆Hin,sensible + ∆Hsolution = 5 – 20 + 10 = -5 J.
Question 6
Marks : +2 | -2
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What is the heat transferred from 5 mole of the system if the output sensible heat is 1 J/mole, input sensible heat is 3 J/mole, and heat of solution is 4 J/mole?
0
5 J
10 J
20 J
Explanation:
Q = ∆Hout,sensible – ∆Hin,sensible + ∆Hsolution = 5*(1 – 3 + 4) = 10 J.
Question 7
Marks : +2 | -2
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What is the heat of dissolution if the heat of reaction is 10 J in the energy balance?
-10 J
10 J
0
Cannot be determined
Explanation:
Heat of dissolution = – Heat of solution = – Heat of reaction = -10 J.
Question 8
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How is the graph of the heat of solution and dilution?
Straight Line
Curve with finite heat of solution at infinite dilution
Curve with Infinite heat of solution at infinite dilution
None of the mentioned
Explanation:
Heat of solution is a finite curve at infinite dilution.
Question 9
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What is the heat transferred from the system if the output sensible heat is 5 J, input sensible heat is 25 J, and heat of solution is 20 J?
0
5 J
10 J
15 J
Explanation:
Q = ∆Hout,sensible – ∆Hin,sensible + ∆Hsolution = 5 – 15 + 20 = 15 J.
Question 10
Marks : +2 | -2
Pass Ratio : 100%
What is the heat transferred from the system if the output sensible heat is 10 J, input sensible heat is 15 J, and heat of solution is 20 J?
10 J
15 J
20 J
25 J
Explanation:
Q = ∆Hout,sensible – ∆Hin,sensible + ∆Hsolution = 10 – 15 + 20 = 15 J.