Na2B4O7(s) <> 2Na+(aq) + B4O72-(aq) -RTlnK = deltaH - T deltaS and/or lnK = (-deltaH)/R(1/T)+ (deltaS)/R Temp. of borax sample (℃) Temp. of sample K mL of 0.195 HCl added to reach equivalence point mol H+ [B4O72- ] M [Na+] M equilibrium constant K 50.5 323.65 43.15 0.00841 0.841 1.682 2.38 40.3 313.45 20.94 0.00408 0.408 1.632 1.09 29.6 302.75 11.51 0.00224 0.224 0.448 0.049 Using the table and the equation to graph with lnK has the y-axis and 1/T as the x-axis.
Na2B4O7(s) <> 2Na+(aq) + B4O72-(aq) -RTlnK = deltaH - T deltaS and/or lnK = (-deltaH)/R(1/T)+ (deltaS)/R Temp. of borax sample (℃) Temp. of sample K mL of 0.195 HCl added to reach equivalence point mol H+ [B4O72- ] M [Na+] M equilibrium constant K 50.5 323.65 43.15 0.00841 0.841 1.682 2.38 40.3 313.45 20.94 0.00408 0.408 1.632 1.09 29.6 302.75 11.51 0.00224 0.224 0.448 0.049 Using the table and the equation to graph with lnK has the y-axis and 1/T as the x-axis.
Introduction to Chemical Engineering Thermodynamics
8th Edition
ISBN:9781259696527
Author:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Publisher:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Chapter1: Introduction
Section: Chapter Questions
Problem 1.1P
Related questions
Question
Na2B4O7(s) <> 2Na+(aq) + B4O72-(aq)
-RTlnK = deltaH - T deltaS
and/or
lnK = (-deltaH)/R(1/T)+ (deltaS)/R
|
Temp. of borax sample (℃) |
Temp. of sample K |
mL of 0.195 HCl added to reach equivalence point |
mol H+ |
[B4O72- ] M |
[Na+] M |
equilibrium constant K |
|
50.5 |
323.65 |
43.15 |
0.00841 |
0.841 |
1.682 |
2.38 |
|
40.3 |
313.45 |
20.94 |
0.00408 |
0.408 |
1.632 |
1.09 |
|
29.6 |
302.75 |
11.51 |
0.00224 |
0.224 |
0.448 |
0.049 |
Using the table and the equation to graph with lnK has the y-axis and 1/T as the x-axis.
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