Principles of Instrumental Analysis
7th Edition
ISBN: 9781305577213
Author: Douglas A. Skoog, F. James Holler, Stanley R. Crouch
Publisher: Cengage Learning
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Chapter 12, Problem 12.12QAP
Interpretation Introduction
Interpretation:
For the given data, weight percentage of manganese is to be determined, where Mn to Ba count ratio is 0.936 considering barium as internal standard.
Concept introduction:
Weight percentage of Mn is calculated by plotting the graph between ratio of fluorescence intensity and weight percentage of Mn. The values used for this graph will be obtained by using a spreadsheet for the given data and calculation between cells of spreadsheet. Unknown quantities and required quantities are obtained by the calculation which will be done between cells of spreadsheet.
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a. The change in the Gibbs energy of a certain constant pressure process is found to fit the expression:
AG-85.1 J mol −1 +36.5 J mol ¹K-1 × T
A. Calculate the value of AS for the process.
B. Next, use the Gibbs-Helmholtz equation:
(a(AG/T))
ΔΗ
-
T2
to calculate the value of AH for the process.
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Principles of Instrumental Analysis
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ISBN:9781305577213
Author:Douglas A. Skoog, F. James Holler, Stanley R. Crouch
Publisher:Cengage Learning