i just need help with degree of freedoms... i see 3 variables 3 equations but what about flows, compositions, constraits, stream variables, performancedon't need the math just the process flow diagramother ppl say 3=3 so DOF of 0 but I'm seeing compositions and stuff here plz help A spent sulfuric acid stream from a nitration process consists of 30. wt%H2SO4 in water. This dilute acid is to be strengthened by the addition of a stream of 90.wt% sulfuric acid, and a stream of 90. wt% nitric acid (HNO3). The product stream is toconsist of 40. wt% sulfuric acid and 40. wt% nitric acid. The resulting mixture isproduced at 100. Ibm/min. Calculate the quantities of spent and concentrated acids thatshould be mixed to produce the fortified acid mix. Perform a DOF analysis to show thata solution is possible. You must DRAW A DIAGRAM and SHOW YOUR WORK.VariablesConstraintsFlow| CompositionPerformanceMaterial BalancesTotalStreamSystemTotal

Answered: degree of freedom

Introduction to Chemical Engineering Thermodynamics

8th Edition

ISBN:9781259696527

Author:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart

Publisher:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart

Chapter1: Introduction

Section: Chapter Questions

Problem 1.1P

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i just need help with degree of freedoms...

i see 3 variables 3 equations

but what about flows, compositions, constraits, stream variables, performance

don't need the math just the process flow diagram

other ppl say 3=3 so DOF of 0 but I'm seeing compositions and stuff here

plz help

A spent sulfuric acid stream from a nitration process consists of 30. wt%
H2SO4 in water. This dilute acid is to be strengthened by the addition of a stream of 90.
wt% sulfuric acid, and a stream of 90. wt% nitric acid (HNO3). The product stream is to
consist of 40. wt% sulfuric acid and 40. wt% nitric acid. The resulting mixture is
produced at 100. Ibm/min. Calculate the quantities of spent and concentrated acids that
should be mixed to produce the fortified acid mix. Perform a DOF analysis to show that
a solution is possible. You must DRAW A DIAGRAM and SHOW YOUR WORK.
Variables
Constraints
Flow
| Composition
Performance
Material Balances
Total
Stream
System
Total

Expert Solution

Step 1

Degree of Freedom Analysis is important as it helps in knowing unknown quantities and calculate them. Flow rates, compositions and sometimes temperature and pressure comes under consideration. Degrees of Freedom is difference between Variables and Constraints where the above mentioned are segregated into these two. The solution is only possible when the degrees of freedom is equal to zero.