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.
• Exothermic reactions
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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