Problem: A chemical reaction absorbs heat from the surroundings. Therefore it is _________ and has a ________ value of ΔH.A. endothermic, negative B. endothermic, positive C. isothermic (i.e. no change in temperature), zero D. exothermic, positive E. exothermic, negative

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Establish the definition of exothermic and endothermic reaction and determine which is the proper answer for: A chemical reaction absorbs heat from the surroundings. Therefore it is _________ and has a ________ value of ΔH.

Recall that:

• Exothermic reactions

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Problem Details

A chemical reaction absorbs heat from the surroundings. Therefore it is _________ and has a ________ value of ΔH.

A. endothermic, negative 

B. endothermic, positive 

C. isothermic (i.e. no change in temperature), zero 

D. exothermic, positive 

E. exothermic, negative

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