Enthalpy

[Chloe Alviz 1E]

When exactly does enthalpy equal "q"? Are there certain conditions we need to follow?

[Andrew Pfeiffer 2E]

If there is no non-expansion work done on the system and the pressure is still constant, then the heat consumed or released by the system will be equal to q.

[JohnWalkiewicz2J]

In terms of enthalpy, ΔH = q only when pressure is constant.

[Janet Nguy 2C]

q = enthalpy when the pressure is constant, such as in an open system.

[ABombino_2J]

q=enthalpy only when the pressure is constant because no other work is being done.

[Areena H 2K]

When q equals delta H that means that pressure is constant in the system. There is also no other work being done on the system.

[Dina Marchenko 2J]

How does enthalpy or change in enthalpy relate to q when pressure isn't constant?

[Maya Beal Dis 1D]

Do we need to memorize the table in the textbook that tells you which fraction to multiply R by based on if the reactant is an atom or molecule and so forth?