Barium Hydroxide and Ammonium Thiocyanate (Endothermic)

Ba(OH)2·8H2O + 2NH4SCN → Ba(SCN)2 + 2NH3 + 10H2O

अवलोकन

This highly endothermic acid-base reaction absorbs so much heat that it can freeze water beneath the flask. Mixing barium hydroxide octahydrate with ammonium thiocyanate drops the temperature below -20 C. The ammonium ion acts as a weak acid donating protons to hydroxide.

प्रतिभागी

भूमिका पदार्थ गुणांक अवस्था
उत्पाद Ammonia NH₃ 2 (g)
उत्पाद Water H₂O 10 (l)

रोजमर्रा का उदाहरण

This is one of the most dramatic endothermic reaction demonstrations, where a wet board freezes to a beaker as the reaction proceeds.

औद्योगिक महत्व

This reaction is primarily used as a teaching demonstration of endothermic processes and entropy-driven reactions, illustrating the thermodynamics concept that ΔG = ΔH - TΔS.

गुण

प्रकार
Acid-Base
प्रतिवर्ती
नहीं
ऊर्जा
ऊष्माशोषी
ΔH
170.0 kJ/mol

संबंधित अभिक्रियाएँ

Hydrochloric Acid and Barium Hydroxide Acetic Acid and Sodium Acetate Buffer System Acetic Acid Dissociation in Water Ammonia and Hydrochloric Acid Ascorbic Acid and Sodium Hydroxide Carbonic Acid and Sodium Hydroxide Aluminum Hydroxide as Amphoteric Acid with NaOH Aluminum Chloride and Chloride Ion (Lewis Acid-Base) Acetic Acid and Sodium Hydroxide Neutralization Formic Acid and Sodium Hydroxide

Frequently Asked Questions

What is the equation for Barium Hydroxide and Ammonium Thiocyanate (Endothermic)?
The balanced equation is: Ba(OH)₂·8H₂O + 2NH₄SCN → Ba(SCN)₂ + 2NH₃ + 10H₂O.
What type of reaction is Barium Hydroxide and Ammonium Thiocyanate (Endothermic)?
Barium Hydroxide and Ammonium Thiocyanate (Endothermic) is a acid-base reaction.
Is Barium Hydroxide and Ammonium Thiocyanate (Endothermic) exothermic or endothermic?
Barium Hydroxide and Ammonium Thiocyanate (Endothermic) is endothermic (absorbs energy). The enthalpy change (ΔH) is 170.0 kJ/mol.