Item #: PF2007
In this lab experience, students experiment to determine whether reactions are endothermic or exothermic based on their color change at hot and cold temperatures. Students will come to the understanding that some reactions are reliant on temperature to shift their equilibrium. Often the focus is on solution concentration and students forget the role that temperature and pressure play. The cobalt chloride solution is endothermic and the iron thiocyanate solution is exothermic. The equilibrium for both is reversible. The industrial production of ammonia is exothermic. Students will see that for ammonia production thermal equilibrium is just one piece. It is actually a complex equilibrium that relies on concentration, pressure and temperature working together. This will help students appreciate the broader concept of equilibrium.
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