Answered: processes would ΔS° be expected to be…

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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Question

For which of the following processes would ΔS° be expected to be most positive?

Group of answer choices

A. H₂O(l) → H₂O(s)

B. 2NO₂(g) → N₂O₄(g)

C. NH₃(g) + HCl(g) → NH₄Cl(s)

D.O₂(g) + 2H₂(g) → 2H₂O(g)

E. 2N₂H₄(g) → 2NH₃(g) + N₂(g) + H₂(g)

F. O₂(g) + 2H₂(g) → 2H₂O(g)

For the process HX(s) → HX(l), ΔH° = 9.17 kJ/mol and ΔS° = 43.9 J/mol/K. What is the melting point of HX?

ΔΔ G = ΔΔ H - T ΔΔ S

Group of answer choices

A. –130 °C

B. 130 °C

C. 209 °C

D. 64 °C

E. –64 °C

Substance X has a heat of vaporization of 45.1 kJ/mol at its normal boiling point (423°C). For the process X(l) → X(g) at 1 atm and 423°C calculate the value of ΔS_surr.

ΔΔS_surroundings = -ΔΔH_system/T

Group of answer choices

A. –64.8 J/K mol

B. –107 J/K mol

C. 0

D. 107 J/K mol

E. 64.8 J/K mol

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