WAEC - Chemistry (2001 - No. 17)
Consider the following equation: Ag+ (aq) + CI-(aq) → Ag+CI- (s) ; ∆H = - 65.7 kJmol-1. From the equation, it can be deduced that
direct combination is involved and the reaction is endothermic
a solid is formed and heat is evolved
activation energy is high and a catalyst is required
the reaction is endothermic and occurs at high temperature
توضیح
From the chemical equation, the product Ag\(^+\) Cl\(^-\) is solid and for the fact that H is -ve, it is exothermic i.e heat was evolved. Option B is the correct answer.