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Posted: Tue Jan 29, 2019 6:03 pm
Why is the change in enthalpy equal to heat absorbed or released? How does that work?
Posted: Tue Jan 29, 2019 6:09 pm
enthalpy is defined as the heat in the system so when we are talking about deltaH that is the change in enthalpy between a product and reactant. We can say that heat released is negative because we measure deltaH by products - reactants and if it is exothermic the heat of the product is less than reactant making the final answer negative.
Posted: Tue Jan 29, 2019 7:02 pm
Enthalpy is the study of heat absorbed or released in a chemical reaction. So when you calculate the change of heat in a system, you are calculating the enthalpy of the system. It can be represented by deltaH.
Posted: Tue Jan 29, 2019 8:07 pm
Yes, the delta H is equivalent to the enthalpy. You get the exact number using hess's law.
Posted: Wed Jan 30, 2019 12:40 am
Delta H is the change in enthalpy.