Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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Transcribed Image Text:Experiment #1
1.65 J
Experiment #2
5.38 J
Q in joules (J) from Eq. 1
Q in kJ (conversion factor
Moles of Mg from Eq. 3
1 kJ/1000 J)
0.00165 kJ
0.00538 kJ
%3D
0.00567901 mol
0.0099177 mo
Experiment #1 Experiment #2
Initial Temperature, T.
Final Temperature, Tt
20.5
20.5
32.2
42.3
Temperature Change, AT 11.7
21.8
Mass of magnesium, mMg
0.138 g
0.241 g
"Mg
The number of moles of Mg, nMg., is calculated by dividing the mass of Mg, mMg, by the
molar mass of Mg (24.3 g/mol):
mMg
24.3 g/mol
Eq. 3
nMg
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