What is a chemical reaction that absorbs heat from the surrounding? Does this reaction have a neutral, positive or negative #DeltaH# at constant pressure?

Risposta:

Negativo

Spiegazione:

#ΔH
# is change in entalpia.

When energy is input into the system (heat) #ΔH
# will have a positive value.

Valori positivi di #ΔH
# tell us that energy was input into the system, breaking constituent chemical bonds.

quando #ΔH
# is negative, this means that bonds were formed and that the system has released energy into the universe.

Consider the graphic below where #ΔH
# is negative:inserisci qui la fonte dell'immagine

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