Confusions about the relation of activation energy and enthalpy …
Mar 9, 2025 · Therefore the enthalpy change, changes as the amount of the reactants change. However I've read that the activation energy of a reaction does not change unless a catalyst is …
What is the change in enthalpy for constant volume?
Feb 21, 2021 · Enthalpy is the heat released during a chemical process under conditions of constant pressure. Therefore all the equations you have presented are correct. Expression two …
physical chemistry - why do we use the initial pressure and final ...
Oct 18, 2024 · Why is the change of enthalpy equal to the change of internal energy + P (initial) times the change in volume + V (final) times the change in enthalpy. I know how this formula is …
physical chemistry - Comparing formula for enthalpy change with …
May 17, 2014 · Comparing formula for enthalpy change with bond dissociation energy and formation enthalpy Ask Question Asked 11 years, 5 months ago Modified 6 years, 4 months ago
thermodynamics - Thermochemistry: What is the difference …
May 7, 2022 · But then, bond enthalpy also finds the change in heat of reaction with the formula: change in heat of reaction = bonds broken (reactant) – bonds formed (product). If it's negative, …
Why is the enthalpy change not zero in an adiabatic process?
Jan 5, 2014 · Change in enthalpy does depend on the change in pressure. Anyway, if we deal with infinitesimals, we need not worry about having P and $\Delta P$ in the same equation.
thermodynamics - Why is the enthalpy change of an ideal gas a …
Aug 15, 2021 · While teaching us thermodynamics our chemistry teacher told us that enthalpy change of a real gas is a function of temperature, pressure etc. but the enthalpy change of an …
physical chemistry - Why is the enthalpy of a reaction equal to the ...
Mar 22, 2018 · The enthalpy of formation of methane is a good example since carbon does not react with hydrogen directly to give methane. However carbon, hydrogen and methane can be …
What would be the enthalpy change for a isothermal expansion?
Aug 17, 2016 · If the initial and final equilibrium temperatures are the same (irrespective of what happens along the path), the change in enthalpy of an ideal gas is zero. The enthalpy and …
Enthalpy Change in Reversible Isothermal Process
Dec 6, 2024 · Thank you for your answer. But if we look at the question I've attached, in process XY, there is a change in volume of the gas. I get that the pressure must be compensating it at …