Question
Asked Dec 6, 2019
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5. Judy's data plot has a lesser slope than Nancy's. Which student will have the more
positive AH° for the dissolution of borax? Explain. Hint: for interpretation, remember
that a slope of -100 is less than a slope of -150.
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5. Judy's data plot has a lesser slope than Nancy's. Which student will have the more positive AH° for the dissolution of borax? Explain. Hint: for interpretation, remember that a slope of -100 is less than a slope of -150.

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Expert Answer

Step 1

The equation for Gibbs free energy is written in equation (1).

The Gibbs free energy in equilibria is written in equation (2).

Combine equations (1) and (2), as shown in equation (3). This equation is in the form of straight line represented by y = mx + b.

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ΔGΔΗ -TAS (1) ΔG-RT In K, (2) eg ΔΗ ΔS. In K (3) RT R Θ

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Step 2

The straight line with a slope equal to -∆H/R is formed in t...

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ΔΗ. slope = R AH ΔΗ' slope = 8.314 J/mol.K AH° =-slope× 8.314 J/mol.K

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Chemical Thermodynamics

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