Pure crystalline silicon, Si (s), can be obtained by reacting silicon dioxide (in the crystalline form known as quartz, found in common sand) with magnesium according to the reaction: SiO2 (s) +2 Mg (s) = Si (s) +2 MgO (s) i. Calculate AGrxn for this process at 25.0 °C ii. Calculate AGrxn for this process at 500.0 °C iii. Is this reaction spontaneous either or both temperatures? If not, at which temperature is the reaction MORE thermodynamically favored? b. Calculate the temperature at which the reaction becomes spontaneous. Is this an upper or lower limit for spontaneity? Explain. iv.

Pure crystalline silicon, Si (s), can be obtained by reacting silicon dioxide (in the crystalline form known as quartz, found in common sand) with magnesium according to the reaction: SiO2 (s) +2 Mg (s) = Si (s) +2 MgO (s) i. Calculate AGrxn for this process at 25.0 °C ii. Calculate AGrxn for this process at 500.0 °C iii. Is this reaction spontaneous either or both temperatures? If not, at which temperature is the reaction MORE thermodynamically favored? b. Calculate the temperature at which the reaction becomes spontaneous. Is this an upper or lower limit for spontaneity? Explain. iv.

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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