16 янв. 2019 г. · Enthalpy is a useful state function for systems at constant pressure because it does not change just because the volume changes. Enthalpy change defined at constant pressure only? Change in Enthalpy when Pressure is constant Другие результаты с сайта chemistry.stackexchange.com

4 мая 2017 г. · When a gas is heated at const vol., no external work is done and so the heat supplied is consumed only in increasing the internal energy of gas. Why does enthalpy equal heat under constant pressure? - Quora Does enthalpy change when pressure is constant? - Quora Enthalpy change is equal to heat given at constant pressure ... How is enthalpy the heat contained by a body at constant ... Другие результаты с сайта www.quora.com

7 июл. 2023 г. · Enthalpy is a state function whose change indicates the amount of heat transferred from a system to its surroundings or vice versa, at constant pressure.

26 мая 2021 г. · At constant pressure, dP = 0, so dH = Q, which is just the heat released during the process.

The enthalpy is measured at constant pressure beacuse the exact value for the change in enthalpy can be calculated at constant pressure.

30 сент. 2021 г. · At constant pressure, we know that enthalpy is equal to q (heat transfer). However, we also know that at constant volume, enthalpy is only equal to the change ... constant pressure and enthalpy - CHEMISTRY COMMUNITY Heat at a constant pressure and enthalpy - Laurence Lavelle Heat and Enthalpy at Constant Pressure/Constant Volume Enthalpy and internal energy under constant volume Другие результаты с сайта lavelle.chem.ucla.edu

Enthalpy is a property defined in terms of the internal energy, pressure, and volume of a material: H = U + P V It does not apply only to constant pressure.

In practice, a change in enthalpy is the preferred expression for measurements at constant pressure, because it simplifies the description of energy transfer. Stagnation enthalpy · Enthalpy of vaporization · Enthalpy of fusion · Internal energy

Because the reaction is run at constant pressure, the change in the enthalpy that occurs during the reaction is equal to the change in the internal energy ... Internal Energy · First Law of Thermodynamics