ELEM.PRIN.OF CHEM.PROCESS-ACCESS
ELEM.PRIN.OF CHEM.PROCESS-ACCESS
4th Edition
ISBN: 9781119099918
Author: FELDER
Publisher: WILEY
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Chapter 3, Problem 3.19P
Interpretation Introduction

(a)

Interpretation:

Draw a calibration curve of mass flow rate versus rotameter reading. Use it to estimate the mass flow rate of a water stream with the rotameter reading of 5.3

Concept introduction:

A calibration curve was prepared in order to use a rotameter. A calibration technique was to calibrate the rotameter. The observed results are as follows,

Rotameter Reading Collection Time (min) Volume collected (cm3)
2 1 297
2 1 301
4 1 454
4 1 448
6 0.5 300
6 0.5 298
8 0.5 371
8 0.5 377
10 0.5 440
10 0.5 453

So, we can draw the calibration curve using above data.

Interpretation Introduction

(b)

Interpretation:

For a measured flow rate of 610 g/min, calculate the 95% confidence limits on the true flow rate.

Concept introduction:

The mean difference between duplicates (Di) give the estimation of the standard deviation (Sx). This can be calculated by using the following equation,

Sxπ2Di=0.8862Di

Furthermore, confidence limits on measured values can be calculated using the mean difference between duplicates.

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Chapter 3 Solutions

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