Chemical Engineering

Degrees of Freedom Analysis

Question 1
Marks : +2 | -2
Pass Ratio : 100%
What are the degrees of freedom?
Total variables in the process
Total species in the process
Total reactions in the process
None of the mentioned
Explanation:
Degrees of freedom is the total number of variables involved in the process.
Question 2
Marks : +2 | -2
Pass Ratio : 100%
In a reactor two stream are entering, one with CH4 at 10 atm and 27oC, and another with O2 at 10 atm and 0oC, producing CO2, CO, H2O, and O2 at 10 atm and 23oC, what are the total degrees of freedom?
12
16
18
20
Explanation:
Total species = 1 + 1 + 4 = 6, total stream flows = 3, stream pressures = 3, stream temperatures = 3, heat released = 1, and extent of reaction = 2, => degrees of freedom = 6 + 3 + 3 + 3 + 1 + 2 = 18.
Question 3
Marks : +2 | -2
Pass Ratio : 100%
In a reactor two stream are entering, one with H2 at 10 atm and 27oC, and another with O2 at 10 atm and 0oC, producing H2O2, H2O, and O2 at 10 atm and 23oC, what are the total degrees of freedom?
12
17
19
23
Explanation:
Total species = 1 + 1 + 3 = 5, total stream flows = 3, stream pressures = 3, stream temperatures = 3, heat released = 1, and extent of reaction = 2, => degrees of freedom = 5 + 3 + 3 + 3 + 1 + 2 = 17.
Question 4
Marks : +2 | -2
Pass Ratio : 100%
In a reactor two stream are entering, one with S at 10 atm and 27oC, and another with O2 at 10 atm and 0oC, producing SO2, SO3, and O2 at 10 atm and 23oC, what are the total degrees of freedom?
10
13
15
17
Explanation:
Total species = 1 + 1 + 3 = 5, total stream flows = 3, stream pressures = 3, stream temperatures = 3, heat released = 1, and extent of reaction = 2, => degrees of freedom = 5 + 3 + 3 + 3 + 1 + 2 = 17.
Question 5
Marks : +2 | -2
Pass Ratio : 100%
What are the total degrees of freedom if the number of species are 4, total streams are 2, stream temperature 2, stream pressure 1 and heat released 1, extent of reaction 1?
4
7
11
15
Explanation:
Degrees of freedom = 4 + 2 + 2 + 1 + 1 + 1 = 11.
Question 6
Marks : +2 | -2
Pass Ratio : 100%
In a reactor two stream are entering, one with N2 at 10 atm and 27oC, and another with O2 at 10 atm and 0oC, producing NO, NO2, NO3, and O2 at 10 atm and 23oC, what are the total degrees of freedom?
12
17
19
21
Explanation:
Total species = 1 + 1 + 4 = 6, total stream flows = 3, stream pressures = 3, stream temperatures = 3, heat released = 1, and extent of reaction = 3, => degrees of freedom = 6 + 3 + 3 + 3 + 1 + 3 = 19.
Question 7
Marks : +2 | -2
Pass Ratio : 100%
What are the total degrees of freedom if the number of species are 5, total streams are 2, stream temperature 2, stream pressure 2 and heat released 1?
1
5
6
12
Explanation:
Degrees of freedom = 5 + 2 + 2 + 2 + 1 = 12.
Question 8
Marks : +2 | -2
Pass Ratio : 100%
What are the total degrees of freedom if the number of species are 8, total streams are 4, stream temperature 2, stream pressure 2 and heat released 1, extent of reaction 3?
12
16
20
24
Explanation:
Degrees of freedom = 8 + 4 + 2 + 2 + 1 + 3 = 20.
Question 9
Marks : +2 | -2
Pass Ratio : 100%
What are the total degrees of freedom if the number of species are 8, total streams are 3, stream temperature 3, stream pressure 3 and heat released 1, extent of reaction 2?
8
12
15
17
Explanation:
Degrees of freedom = 8 + 3 + 3 + 3 + 1 + 2 = 17.
Question 10
Marks : +2 | -2
Pass Ratio : 100%
In a reactor two stream are entering, one with H2 at 10 atm and 27oC, and another with O2 at 10 atm and 0oC, producing H2O at 10 atm and 23oC, what are the total degrees of freedom?
10
14
16
19
Explanation:
Total species = 1 + 1 + 1 = 3, total stream flows = 3, stream pressures = 3, stream temperatures = 3, heat released = 1, and extent of reaction = 1, => degrees of freedom = 3 + 3 + 3 + 3 + 1 + 1 = 14.