Na2B4O7(s) <> 2Na+(aq) + B4O72-(aq)-RTlnK = deltaH - T deltaSand/orlnK = (-deltaH)/R(1/T)+ (deltaS)/RTemp. of borax sample (℃)Temp. of sample KmL of 0.195 HCl added to reach equivalence pointmol H+[B4O72- ] M[Na+] Mequilibrium constant K50.5323.6543.150.008410.8411.6822.3840.3313.4520.940.004080.4081.6321.0929.6302.7511.510.002240.2240.4480.049Using the table and the equation to graph with lnK has the y-axis and 1/T as the x-axis.

Write the reaction as follows: Na2B4O7(s) ↔ 2Na+(aq) + B4O72-(aq) Write the relation between…

Answered: Na2B4O7(s) <> 2Na+(aq) + B4O72-(aq)…

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

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Question

Na₂B₄O₇(s) <> 2Na⁺(aq) + B₄O₇^2-(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+	[B₄O₇^2- ] 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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