The value of enthalpy for a chemical reaction, A;H, can be experimentally determined by measuring the value of the equilibrium constant of a reaction at different temperatures. Tc do this we need to plot the natural log of the equilibrium constant, In(Keq) (your y- variable), vs 1/T (your x-variable) where T is the temperature in Kelvin. The slope of this plot = -A,H/R where R is the gas constant 8.314 J/(K · mole). In an experiment, the following values of equilibrium constant were determined at the specified temperatures in Kelvin: %3D T(K) 350 400 450 500 Keg(no units) 0.000398 0.0141 0.186 1.48 Make a plot of In(Keq) (y-axis) versus 1/T (x-axis). You will need to set up extra columns in your spreadsheet for 1/T and In(Keq) using formulas. Using the linear trendline feature of Google Sheets, determine the value of the slope (include units!). Also enter the formula for calculating slope and intercept into cells. From these cells, calculate A,H using spreadsheet calculations. Keep track of units and significant figures! [Note: You do not need to understand thermodynamics to do this exercise.l
The value of enthalpy for a chemical reaction, A;H, can be experimentally determined by measuring the value of the equilibrium constant of a reaction at different temperatures. Tc do this we need to plot the natural log of the equilibrium constant, In(Keq) (your y- variable), vs 1/T (your x-variable) where T is the temperature in Kelvin. The slope of this plot = -A,H/R where R is the gas constant 8.314 J/(K · mole). In an experiment, the following values of equilibrium constant were determined at the specified temperatures in Kelvin: %3D T(K) 350 400 450 500 Keg(no units) 0.000398 0.0141 0.186 1.48 Make a plot of In(Keq) (y-axis) versus 1/T (x-axis). You will need to set up extra columns in your spreadsheet for 1/T and In(Keq) using formulas. Using the linear trendline feature of Google Sheets, determine the value of the slope (include units!). Also enter the formula for calculating slope and intercept into cells. From these cells, calculate A,H using spreadsheet calculations. Keep track of units and significant figures! [Note: You do not need to understand thermodynamics to do this exercise.l
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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What are the units and significant figures in this problem?
![Is it OK, statistically speaking, to throw out the 23.6 value? Establish the lower and
upper bounds for the acceptable range of values following the simple rule learned in
the practice calculations. Write down your answer for this in a cell of this sheet.
Exercise 7 (Sheet 7 in your spreadsheet)
The value of enthalpy for a chemical reaction, A;H, can be experimentally determined by
measuring the value of the equilibrium constant of a reaction at different temperatures. To
do this we need to plot the natural log of the equilibrium constant, In(Keq) (your y-
variable), vs 1/T (your x-variable) where T is the temperature in Kelvin. The slope of this
plot = -A,H/R where R is the gas constant 8.314 J/(K · mole). In an experiment, the
following values of equilibrium constant were determined at the specified temperatures in
Kelvin:
T(K)
Keg(no units)
350
400
450
500
0.000398
0.0141
0.186
1.48
Make a plot of In(Keq) (y-axis) versus 1/T (x-axis). You will need to set up extra columns in
your spreadsheet for 1/T and In(Keq) using formulas. Using the linear trendline feature of
Google Sheets, determine the value of the slope (include units!). Also enter the formula for
calculating slope and intercept into cells. From these cells, calculate A,H using spreadsheet
calculations. Keep track of units and significant figures!
[Note: You do not need to understand thermodynamics to do this exercise.]
Exercise 8 (Sheet 8 in your spreadsheet)
A researcher tabulated values of free energy, AGA, of a pure
liquid at different temperatures as chown below The
researcher asserts the der
T/K
50
AGA/1/mol)
Rogo](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F78522570-12cf-4ad8-ad0b-40380922a332%2F4c53dea8-7c1a-49a2-841a-8b8fab2231ab%2Ft3bqt7h_processed.jpeg&w=3840&q=75)
Transcribed Image Text:Is it OK, statistically speaking, to throw out the 23.6 value? Establish the lower and
upper bounds for the acceptable range of values following the simple rule learned in
the practice calculations. Write down your answer for this in a cell of this sheet.
Exercise 7 (Sheet 7 in your spreadsheet)
The value of enthalpy for a chemical reaction, A;H, can be experimentally determined by
measuring the value of the equilibrium constant of a reaction at different temperatures. To
do this we need to plot the natural log of the equilibrium constant, In(Keq) (your y-
variable), vs 1/T (your x-variable) where T is the temperature in Kelvin. The slope of this
plot = -A,H/R where R is the gas constant 8.314 J/(K · mole). In an experiment, the
following values of equilibrium constant were determined at the specified temperatures in
Kelvin:
T(K)
Keg(no units)
350
400
450
500
0.000398
0.0141
0.186
1.48
Make a plot of In(Keq) (y-axis) versus 1/T (x-axis). You will need to set up extra columns in
your spreadsheet for 1/T and In(Keq) using formulas. Using the linear trendline feature of
Google Sheets, determine the value of the slope (include units!). Also enter the formula for
calculating slope and intercept into cells. From these cells, calculate A,H using spreadsheet
calculations. Keep track of units and significant figures!
[Note: You do not need to understand thermodynamics to do this exercise.]
Exercise 8 (Sheet 8 in your spreadsheet)
A researcher tabulated values of free energy, AGA, of a pure
liquid at different temperatures as chown below The
researcher asserts the der
T/K
50
AGA/1/mol)
Rogo
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