Why was a stir bar added to the cyclohexane - toluene mixture prior to the start of thefractional distillation?.

257 grams h2o i think

Answerδh > 0explanationc₆h₆  (s)  → c₆h₆ (l)if you are changing it from a solid to a liquid, you are pretty much melting the solid. this requires heat energy. therefore, the reaction is endothermic (takes in energy); the system enthalpy increases as the reaction proceeds: δh > 0.