. Consider the following system at equilibrium: SiF4(g) + 2 H2O(g) SiO2(g) + 4 HF(g) + 103.8 kJ
(a) Is the reaction endothermic or exothermic?
(b) If HF is added, in which direction will the reaction shift in order to reestablish equilibrium? After the new equilibrium has been established, will the final molar concentrations of and HF increase, decrease, or remain the same?
(c) If heat is added, in which direction will the equilibrium shift?