When heat is released the system undergoes a decrease in enthalpy?True or false?

false.When heat is released the system undergoes a decrease in enthalpy?True or false?
Enthalpy or H





Let's say H = 25 kJ initial





But then the system loses heat





Let's say H = 15 kJ final





So delta H (final minus initial) = -10 kJ





If delta H is negative then the reaction is exothermic and thus energy is released





Therefore: A system that decreases in enthalpy (delta H is negative) will be evident due to the resulting heat felt on the reactant side of the chemical reaction. That heat is being transferred from the system to the surroundings.








Example





Whenever hydrocarbons burn they produce carbon dioxide and water plus heat





Chemically speaking....


C6H12O6 + O2 -----%26gt; CO2 + H20 + Energy %26lt;note: reaction not balanced%26gt;





Answer: TRUE