When ignited, solid ammonium dichromate decomposes in a fiery display. This is the reaction for a "volcano" demonstration. The decomposition produces nitrogen gas, water vapor, and chromium(III) oxide. The temperature is constant at 25°C. Substance AHFⓇ (kJ/mol) Sº (kJ/mol K) Cr₂O3(g) 0.08120 H₂O(1) N2(g) (NH4)2Cr2O7(s) -1147 -242 0 -22.5 Determine A S univ (in kJ/mol K). a. 84.3 Ob. 6.03 c. 6.39 d. 7.66 e. 5.22 0.1187 0.1915 0.1137

When ignited, solid ammonium dichromate decomposes in a fiery display. This is the reaction for a "volcano" demonstration. The decomposition produces nitrogen gas, water vapor, and chromium(III) oxide. The temperature is constant at 25°C. Substance AHFⓇ (kJ/mol) Sº (kJ/mol K) Cr₂O3(g) 0.08120 H₂O(1) N2(g) (NH4)2Cr2O7(s) -1147 -242 0 -22.5 Determine A S univ (in kJ/mol K). a. 84.3 Ob. 6.03 c. 6.39 d. 7.66 e. 5.22 0.1187 0.1915 0.1137

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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