A student, Jen is measuring the standard reaction enthalpy a reaction using van't Hoff equation: 2A (g) <==> B (g) + C (g) at the standard pressure 1 bar. Where A, B, C are the chemicals she knows and measures their partial pressures. She then plots the equillibirum constant of the reaction between 300 K and 600 K. She first fits the data using an empiricial equation shown below: ln(Keq) = -0.85+-280/T + 0.2/T2 where the unit of the temperature T is K and the units of the rest parameters are accordingly to make the total equation unitless. Then she uses the van't Hoff equation and the fitted curve to calculate the reaction enthalpy at 517.7 K. ΔrH = ________ J/mol. 3 sig. fig. Gas constant R = 8.3145 J/mol/K.

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...
icon
Related questions
Question

A student, Jen is measuring the standard reaction enthalpy a reaction using van't Hoff equation:

2A (g)  <==>   B (g) + C (g)

at the standard pressure 1 bar. Where A, B, C are the chemicals she knows and measures their partial pressures. She then plots the equillibirum constant of the reaction between 300 K and 600 K.

 

She first fits the data using an empiricial equation shown below:

ln(Keq) = -0.85+-280/T + 0.2/T2  where the unit of the temperature T is K and the units of the rest parameters are accordingly to make the total equation unitless.

 

Then she uses the van't Hoff equation and the fitted curve to calculate the reaction enthalpy at 517.7 K.  ΔrH = ________ J/mol. 3 sig. fig. Gas constant R = 8.3145 J/mol/K.

 

Expert Solution
trending now

Trending now

This is a popular solution!

steps

Step by step

Solved in 3 steps

Blurred answer
Knowledge Booster
Solutions
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, chemistry and related others by exploring similar questions and additional content below.
Similar questions
  • SEE MORE QUESTIONS
Recommended textbooks for you
Chemistry
Chemistry
Chemistry
ISBN:
9781305957404
Author:
Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:
Cengage Learning
Chemistry
Chemistry
Chemistry
ISBN:
9781259911156
Author:
Raymond Chang Dr., Jason Overby Professor
Publisher:
McGraw-Hill Education
Principles of Instrumental Analysis
Principles of Instrumental Analysis
Chemistry
ISBN:
9781305577213
Author:
Douglas A. Skoog, F. James Holler, Stanley R. Crouch
Publisher:
Cengage Learning
Organic Chemistry
Organic Chemistry
Chemistry
ISBN:
9780078021558
Author:
Janice Gorzynski Smith Dr.
Publisher:
McGraw-Hill Education
Chemistry: Principles and Reactions
Chemistry: Principles and Reactions
Chemistry
ISBN:
9781305079373
Author:
William L. Masterton, Cecile N. Hurley
Publisher:
Cengage Learning
Elementary Principles of Chemical Processes, Bind…
Elementary Principles of Chemical Processes, Bind…
Chemistry
ISBN:
9781118431221
Author:
Richard M. Felder, Ronald W. Rousseau, Lisa G. Bullard
Publisher:
WILEY