Hydrofluoric acid, HF(aq)HF(aq), cannot be stored in glass bottles because compounds called silicates in the glass are attacked by the HF(aq)HF(aq). Sodium silicate (Na2SiO3)(Na2SiO3), for example, reacts as follows: Na2SiO3(s)+8HF(aq)→H2SiF6(aq)+2NaF(aq
Thermochemistry
Thermochemistry can be considered as a branch of thermodynamics that deals with the connections between warmth, work, and various types of energy, formed because of different synthetic and actual cycles. Thermochemistry describes the energy changes that occur as a result of reactions or chemical changes in a substance.
Exergonic Reaction
The term exergonic is derived from the Greek word in which ‘ergon’ means work and exergonic means ‘work outside’. Exergonic reactions releases work energy. Exergonic reactions are different from exothermic reactions, the one that releases only heat energy during the course of the reaction. So, exothermic reaction is one type of exergonic reaction. Exergonic reaction releases work energy in different forms like heat, light or sound. For example, a glow stick releases light making that an exergonic reaction and not an exothermic reaction since no heat is released. Even endothermic reactions at very high temperature are exergonic.
Hydrofluoric acid, HF(aq)HF(aq), cannot be stored in glass bottles because compounds called silicates in the glass are attacked by the HF(aq)HF(aq). Sodium silicate (Na2SiO3)(Na2SiO3), for example, reacts as follows:
Na2SiO3(s)+8HF(aq)→H2SiF6(aq)+2NaF(aq)+3H2O(l)
How many grams of NaF form when 0.430 mol of HF reacts with excess Na2SiO3?
Show steps please thank you
Trending now
This is a popular solution!
Step by step
Solved in 2 steps
