. Potassium crystallizes in a body-centered cubic lattice, and its atomic radius is 235 pm. The atomic mass of K is 39.10 amu. What is the density of K? a.2.030 g cm-3 b.5.060 g cm-3 c.0.811 g cm-3 d.0.442 g cm-3

Physical Chemistry
2nd Edition
ISBN:9781133958437
Author:Ball, David W. (david Warren), BAER, Tomas
Publisher:Ball, David W. (david Warren), BAER, Tomas
Chapter21: The Solid State: Crystals
Section: Chapter Questions
Problem 21.50E
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1. Potassium crystallizes in a body-centered cubic lattice, and its atomic radius is 235 pm. The atomic mass of K is 39.10 amu. What is the density of K?

a.2.030 g cm-3
b.5.060 g cm-3
c.0.811 g cm-3
d.0.442 g cm-3
Given the following data, calculate the lattice energy of potassium iodide, KI.
IEK = 418.8 kJ mol1
AHSub (K) = 90 kJ mol1
AHatomization (12) = 107 kJ mol1
EA, = 295 kJ mol1
AH (KI) = -327.65 kJ mol1
%3D
Note: The thermochemical equation for the standard enthalpies of atomization is
1
-En(standard state) → E(g)
n
Transcribed Image Text:Given the following data, calculate the lattice energy of potassium iodide, KI. IEK = 418.8 kJ mol1 AHSub (K) = 90 kJ mol1 AHatomization (12) = 107 kJ mol1 EA, = 295 kJ mol1 AH (KI) = -327.65 kJ mol1 %3D Note: The thermochemical equation for the standard enthalpies of atomization is 1 -En(standard state) → E(g) n
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