Two aqueous solutions are at room temperature and are mixed in a coffee calorimeter. The reaction...

Two aqueous solutions are at room temperature and are mixed in a coffee calorimeter. The reaction causes the temperature of the resulting solution to fall below room temperature. Whicch statement is true? A) This type of experiment provides data to calculate deltaErxn B)Energy is leaving the system during reaction C)The products have a lower potential energy than the reactants D) The reaction is exothermic E)None of the above is true

Solutions

Expert Solution

A) This type of experiment provides data to calculate deltaErxn is not true because This type of experiment provides data to calculate deltaHrxn.

B)Energy is leaving the system during reaction is not true because it happened in exothermic reaction, while it is an example of endothermic

C)The products have a lower potential energy than the reactants is not true because it happened in exothermic reaction

D) The reaction is exothermic, is not true because it is an endothermic reaction.

E)None of the above is true

A reaction that results in a decrease in temperature is called an endothermic reaction and Endothermic reactions are driven by the addition of heat which comes from surrounding and the products have a higher potential energy than the reactants. Thus the correct answer is (E).

queen_honey_blossom answered 1 year ago

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