Data Table Temp ( K °C) 0.9 223.4 19.4 187.7 59.2 143.3 80.6 117.4

Fundamentals Of Analytical Chemistry
9th Edition
ISBN:9781285640686
Author:Skoog
Publisher:Skoog
Chapter14: Principles Of Neutralization Titrations
Section: Chapter Questions
Problem 14.47QAP
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In lab a student calculates the following equilibrium concentrations for Fe ( aq ) 3 + + SCN ( aq ) − ⇋ FeSCN ( aq ) 2 + at each of the specified temperatures. Calculate Δ H ∘ in units of kJ mol. Report your answer to two places after the decimal.

Data Table
Temp (
K
°C)
0.9
223.4
19.4
187.7
59.2
143.3
80.6
117.4
Transcribed Image Text:Data Table Temp ( K °C) 0.9 223.4 19.4 187.7 59.2 143.3 80.6 117.4
Expert Solution
Step 1

The Van’t Hoff equation is given as :

Chemistry homework question answer, step 1, image 1

Step 2

From the given data table,

T1 = 0.9 oC = (273 + 0.9) K = 273.9 K

K1 = 223.4

T2 = 19.4 oC = (273 + 19.4) K = 292.4 K

K2 = 187.7

△Ho = ?

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