endothermic reaction

2003

2006-11-01 5:39 am

Why this statements is true for an endothermic reaction?
The energy of products is higher than that of the reactants.

endothermic reaction 唔係話undergo endothermic reaction 的mixture 的temperature decrease,咁應該product 的temp. LOWER than reactants?

Why this statement is correct??

回答 (1)

用戶4366

2006-11-01 5:56 am

✔ 最佳答案

May be you mixed up something in your mind.

The melting point of a mixture is lower than its pure component. e.g. the melting point of NaCl is around 800 oC but addition of other substance to it can lower its melting point to well below 800 oC. Addition of NaCl to ice to lower the melting point of ice is also very common in winter in other country.

reactant + heat energy ---> product ( endothermic reaction ).

the energy absorbed is stored as chemical energy. actually as potential energy and is stored as bond energy.

product is higher in potential energy in an endothermic reaction is correct !

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