99. The standard enthalpy of reaction for the dissolution of silica in aqueous hydrofluoric acid is 4.6 kJ/mole. What is the standard enthalpy of formation of silicon tetrafluoride gas? SiO2 (s) + HF (aq) - SIF4 (g) + H2O (I) AH° txn = 4.6 kJ´mole SiO2 (s) HF (aq) -320.1 Н:0 () SiF: (g) Compound AH®F, kJ/mole -910.9 -285.8 ?? a. -1624.3 kJ/ mole -1615.1 kJ/ mole -949.8 kJ' mole 9.10 6 LL mole b. C.

99. The standard enthalpy of reaction for the dissolution of silica in aqueous hydrofluoric acid is 4.6 kJ/mole. What is the standard enthalpy of formation of silicon tetrafluoride gas? SiO2 (s) + HF (aq) - SIF4 (g) + H2O (I) AH° txn = 4.6 kJ´mole SiO2 (s) HF (aq) -320.1 Н:0 () SiF: (g) Compound AH®F, kJ/mole -910.9 -285.8 ?? a. -1624.3 kJ/ mole -1615.1 kJ/ mole -949.8 kJ' mole 9.10 6 LL mole b. C.

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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