qrev vs q

[Agustina Santa Cruz 2F]

What is the difference between qrev vs just regular q? When do we use each?

[Michael Iter 2F]

I'm not completely sure, but q is just heat, and qrev is just a specific notation referring to the heat of a reversible process.

[Lily Kiamanesh 2G]

Hi! I believe that it being a reversible process means that it is behaving as an ideal gas. I think that the (rev) is just specifying that as a condition in the formula.

[Nathan Lao 2I]

The qrev just refers to the way that specific equation is derived. In general, I'm pretty sure the given ΔH (or ΔH that we might have to calculate) is synonymous the qrev that we use to find ΔS.

[Christine Ma 3L]

q and q_rev are both just heat terms, but q_rev refers to heat from a reversible expansion. When systems are approximated as reversible (like when we're trying to calculate the maximum work), we use q_rev.

[Astha Patel 2J]

qrev is heat from a reversible expansion/compression, but q is just a heat term. Make sure that you use qrev when solving for entropy changes.

[Kyle Dizon 3A]

The reversible reaction is presented by qrev, while q just represents the heat.

[Gicelle Rubin 1E]

q and q_rev are both just heat terms, but q_rev refers to heat from a reversible expansion. When systems are approximated as reversible (like when we're trying to calculate the maximum work), we use q_rev.

Thanks for this! I was still a little confused from other replies ;-;

[Arnav Saud 2C]

qrev refers to the reversible reaction's heat while q refers to the overall heat

[Violet Kwan 3H]

qrev is specific for a reversible reaction

[Alison Perkins 2B]

Qrev is the Q of the reverse reaction, which is used for entropy. They're both heat transfer values.

[Armen_Isayan_2L]

The difference between qrev versus regular q is the qrev is significant in identifying the heat of the reversible reaction. On the other hand, q is representative of the overall heat in the reaction.

[Adrienne Chan 1G]

q is just heat in general, but qrev is heat of a reversible reaction

[Queena Chu 3E]

Q and Qrev are both heat transfer values but Qrev is for the reverse reaction.

[Joshua Chung 2D]

There isn't really a notable difference, just that qrev is used to specify that the heat value is taken from a reversible system.

[705383815]

If q is not reversible then there must have been heating lost during the transfer of energy from an external source to the subject gas. Ideal gases retain all heat transferred to them, apparently.

[Brenda Silva 1B]

Qrev is the heat of the reversible reaction while q is the heat.

[OmarArafat_2K]

q represents the overall heat while qrev represents the heat from a reversible expansion.

[Jerry_T]

q_rev is the heat of reversible expansion which can be useful for approximations whereas q is just the heat of expansion.

[Jack_Pearce_2H]

q is the heat of the forward reaction and qrev is the heat of the reverse reaction. qrev is helpful in determining the heat of the reversible reaction at hand, usually associated with S and also the signs of the heat show if the reaction is reversible or not.

[Arnav Saud 2C]

q is normal heat, while q rev refers to the heat of the reversible expansion.

[Diana Aguilar 3H]

Hi! Like many others have stated, q represents just heat while qrev represents the heat of a reversible reaction.