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Consider the following statements
(i) If a condensing liquid does not wet a surface, then drop wise condensation will not take place on it
(ii) Drop wise condensation gives a higher transfer rate than film wise condensation
(iii) Reynolds number of condensing liquid is based on its mass flow rate
(iv) Suitable coating or vapor additive is used to promote film wise condensation
Identify the correct statement
(i) If a condensing liquid does not wet a surface, then drop wise condensation will not take place on it
(ii) Drop wise condensation gives a higher transfer rate than film wise condensation
(iii) Reynolds number of condensing liquid is based on its mass flow rate
(iv) Suitable coating or vapor additive is used to promote film wise condensation
Identify the correct statement
- a)1 and 2
- b)2, 3 and 4
- c)4 only
- d)1, 2 and 3
Correct answer is option 'D'. Can you explain this answer?
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Verified Answer
Consider the following statements(i) If a condensing liquid does not w...
All are correct except the last one because suitable coating or vapor additive is not used to promote film wise condensation.
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Consider the following statements(i) If a condensing liquid does not w...
Condensation is a phase change process in which a vapor is converted into a liquid. Drop wise condensation and film wise condensation are two types of condensation processes. Let's see which statement is correct regarding these two types of condensation.
Statement (i): If a condensing liquid does not wet a surface, then drop wise condensation will not take place on it.
This statement is true. Drop wise condensation occurs on a surface when the condensing liquid wets the surface. If the surface is not wetted by the condensing liquid, drop wise condensation will not take place on that surface.
Statement (ii): Drop wise condensation gives a higher transfer rate than film wise condensation.
This statement is also true. In drop wise condensation, the liquid droplets formed are separated from each other, which provides a higher heat transfer coefficient. In film wise condensation, the liquid film formed on the surface hinders the heat transfer rate. Hence, drop wise condensation gives a higher transfer rate than film wise condensation.
Statement (iii): Reynolds number of condensing liquid is based on its mass flow rate.
This statement is true. Reynolds number is a dimensionless quantity used to predict the flow regime of a fluid. In the case of condensing liquid, Reynolds number is calculated based on its mass flow rate.
Statement (iv): Suitable coating or vapor additive is used to promote film wise condensation.
This statement is false. Suitable coating or vapor additive is used to promote drop wise condensation, not film wise condensation. Film wise condensation can be promoted by increasing the surface area of the condensing surface.
Hence, the correct statements are (i), (ii), and (iii).
Statement (i): If a condensing liquid does not wet a surface, then drop wise condensation will not take place on it.
This statement is true. Drop wise condensation occurs on a surface when the condensing liquid wets the surface. If the surface is not wetted by the condensing liquid, drop wise condensation will not take place on that surface.
Statement (ii): Drop wise condensation gives a higher transfer rate than film wise condensation.
This statement is also true. In drop wise condensation, the liquid droplets formed are separated from each other, which provides a higher heat transfer coefficient. In film wise condensation, the liquid film formed on the surface hinders the heat transfer rate. Hence, drop wise condensation gives a higher transfer rate than film wise condensation.
Statement (iii): Reynolds number of condensing liquid is based on its mass flow rate.
This statement is true. Reynolds number is a dimensionless quantity used to predict the flow regime of a fluid. In the case of condensing liquid, Reynolds number is calculated based on its mass flow rate.
Statement (iv): Suitable coating or vapor additive is used to promote film wise condensation.
This statement is false. Suitable coating or vapor additive is used to promote drop wise condensation, not film wise condensation. Film wise condensation can be promoted by increasing the surface area of the condensing surface.
Hence, the correct statements are (i), (ii), and (iii).
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Consider the following statements(i) If a condensing liquid does not wet a surface, then drop wise condensation will not take place on it(ii) Drop wise condensation gives a higher transfer rate than film wise condensation(iii) Reynolds number of condensing liquid is based on its mass flow rate(iv) Suitable coating or vapor additive is used to promote film wise condensationIdentify the correct statementa)1 and 2b)2, 3 and 4c)4 onlyd)1, 2 and 3Correct answer is option 'D'. Can you explain this answer?
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Consider the following statements(i) If a condensing liquid does not wet a surface, then drop wise condensation will not take place on it(ii) Drop wise condensation gives a higher transfer rate than film wise condensation(iii) Reynolds number of condensing liquid is based on its mass flow rate(iv) Suitable coating or vapor additive is used to promote film wise condensationIdentify the correct statementa)1 and 2b)2, 3 and 4c)4 onlyd)1, 2 and 3Correct answer is option 'D'. Can you explain this answer? for Chemical Engineering 2024 is part of Chemical Engineering preparation. The Question and answers have been prepared according to the Chemical Engineering exam syllabus. Information about Consider the following statements(i) If a condensing liquid does not wet a surface, then drop wise condensation will not take place on it(ii) Drop wise condensation gives a higher transfer rate than film wise condensation(iii) Reynolds number of condensing liquid is based on its mass flow rate(iv) Suitable coating or vapor additive is used to promote film wise condensationIdentify the correct statementa)1 and 2b)2, 3 and 4c)4 onlyd)1, 2 and 3Correct answer is option 'D'. Can you explain this answer? covers all topics & solutions for Chemical Engineering 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Consider the following statements(i) If a condensing liquid does not wet a surface, then drop wise condensation will not take place on it(ii) Drop wise condensation gives a higher transfer rate than film wise condensation(iii) Reynolds number of condensing liquid is based on its mass flow rate(iv) Suitable coating or vapor additive is used to promote film wise condensationIdentify the correct statementa)1 and 2b)2, 3 and 4c)4 onlyd)1, 2 and 3Correct answer is option 'D'. Can you explain this answer?.
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Solutions for Consider the following statements(i) If a condensing liquid does not wet a surface, then drop wise condensation will not take place on it(ii) Drop wise condensation gives a higher transfer rate than film wise condensation(iii) Reynolds number of condensing liquid is based on its mass flow rate(iv) Suitable coating or vapor additive is used to promote film wise condensationIdentify the correct statementa)1 and 2b)2, 3 and 4c)4 onlyd)1, 2 and 3Correct answer is option 'D'. Can you explain this answer? in English & in Hindi are available as part of our courses for Chemical Engineering.
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ample number of questions to practice Consider the following statements(i) If a condensing liquid does not wet a surface, then drop wise condensation will not take place on it(ii) Drop wise condensation gives a higher transfer rate than film wise condensation(iii) Reynolds number of condensing liquid is based on its mass flow rate(iv) Suitable coating or vapor additive is used to promote film wise condensationIdentify the correct statementa)1 and 2b)2, 3 and 4c)4 onlyd)1, 2 and 3Correct answer is option 'D'. Can you explain this answer? tests, examples and also practice Chemical Engineering tests.
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