Answer to Question #118046 in General Chemistry for george

Question

. 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?

Answer 1

(a) the reaction is endothermic

(b) the reaction will shift to the left

Concentration will increase in the moment of HF addition, and will decrease until equilibrium is established

(с) the equilibrium will shift to the right