Physical Chemistry
Physical Chemistry
2nd Edition
ISBN: 9781133958437
Author: Ball, David W. (david Warren), BAER, Tomas
Publisher: Wadsworth Cengage Learning,
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Chapter 18, Problem 18.29E
Interpretation Introduction

Interpretation:

The temperature at which the qrot for HCl is equal to the value of qrot for HBr at 298K is to be calculated.

Concept introduction:

The rotational partition function for the linear molecules is,

qrot=8π2IkTh2=Tθr

Where,

qrot is the rotational partition function.

I is the moment of inertia.

k is the Boltzmann constant.

T is the temperature.

h is the Planck’s constant.

θr is the rotational temperature.

The partition function is a unitless quantity.

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Mass of the reaction solution, msoln (g) Add together the masses of the NaOH (100mL) (aq) and HCl (100mL) (aq). Convert the volume of each solution to mass using 1.000 g/mL as the density (we are assuming these aqueous solutions have the same density as water, see procedure for volumes used).
Using data from enthalpies and free energy of standard formation that we attach below, a) determine the standard enthalpy change and the Gibbs free energy change for the reaction. -b) calculate the thermodynamic equilibrium constant at 298k. -c) determines how the equilibrium constant of this reaction should change with temperature (does it increase, decrease or stay the same?)
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