High School

We appreciate your visit to Why is tex Q p tex always greater than tex Q v tex. This page offers clear insights and highlights the essential aspects of the topic. Our goal is to provide a helpful and engaging learning experience. Explore the content and find the answers you need!

Why is [tex]Q_p[/tex] always greater than [tex]Q_v[/tex]?

Answer :

Final answer:

The enthalpy change at constant pressure (Qp) is always greater than at constant volume (Qv) because Qp also includes the work done by or on the system during a reaction, which Qv does not account for.

Explanation:

The question refers to the enthalpy and energy changes in a chemical reaction, specifically why the enthalpy change at constant pressure (Qp) is always greater than the enthalpy change at constant volume (Qv). In any chemical reaction, the system either absorbs or releases energy, usually in the form of heat.

When the reaction occurs at constant volume, no work is done by or on the system. In this scenario, all the heat transfer is accounted for in the change in internal energy (Qv).

However, if the reaction is happening at constant pressure, part of the energy is utilized to do work by pushing the surroundings back against this pressure (expansion work). This work leads to an additional amount of energy factored into the enthalpy change of the system (Qp).

Thus, Qp (enthalpy change at constant pressure) is always greater than Qv (enthalpy change at constant volume) because the former also includes the work done by or on the system under constant pressure conditions.

Learn more about Enthalpy Change here:

https://brainly.com/question/35890036

#SPJ11

Thanks for taking the time to read Why is tex Q p tex always greater than tex Q v tex. We hope the insights shared have been valuable and enhanced your understanding of the topic. Don�t hesitate to browse our website for more informative and engaging content!

Rewritten by : Barada