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: