Question

How can we that baso4 + nh4cl =. Bacl2 + nh4oh is a endothermic reaction

Answer 1

The reaction between barium hydroxide and ammonium chloride ,

This reaction is a double displacement gas evolution reaction. The products of this reaction are Barium Chloride(BaCl2), Ammonia (NH3) and Water (H2O).

When the this two reactants are mixed together the temperature of the reaction mixture deacreas hence it's endothermic reaction .

Answer 2

Because the reaction of these two after the reaction will make test tube cold and we can feel the coldness of the testube ..So we can say it is endothermic reaction