25 degrees C?

[Olivia D 3B]

When doing a calculation, why is the default temperature 25 degrees C? Is this an arbitrary value or is there a chemical or biological explanation as to why 25 degrees C is used as the temperature of interest?

[Hayley Vu]

25C is just the standardized temperature that we use as a default for calculations, similar to using 1atm for pressure. 25C is also considered room temperature. Hope this helps!

[alexjung1A]

To add on, I think that rather than 25 C being considered room temperature it is considered to be something called "standard ambient temperature". I also think that labs will attempt to keep the temperature near 25 C for this reason, making it the room temperature, but to my knowledge average room temperature is not 25 C.

[oliviahelou]

It is simply the standardized temperature (the one mostly considered for the norm od reactions).

[Libby Stafford 1L]

Exactly, it is giving a definitive value to "room temperature", but really it is just the standard temperature that reactions are carried out at. If another temperature is used, they should state that in the problem itself, but otherwise we can assume 25 degrees C.

[Jessica Servoss 1H]

25 degrees Celsius is "room temperature" (77 degrees F) and we just consider this to be the standard temperature for calculations involving standard state conditions.

[Samantha Quevedo 2L]

25 degrees Celsius is standard room temperature so for this class we assume reactions are being done under that temperature unless stated otherwise!

[tashyavakil 2K]

We use this value because it is considered standard room temperature

[505749458]

The main chemical/biological significance is simply that its easy to keep a system at 25 degrees C rather than wasting resources on keeping it at 0 degrees or anything like that. Every substance has different melting and freezing points, and every reaction has different properties at different temperatures, so this mostly arbitrary 25 degrees makes it easier to study other variables.

[505749458]

The main chemical/biological significance is simply that its easy to keep a system at 25 degrees C rather than wasting resources on keeping it at 0 degrees or anything like that. Every substance has different melting and freezing points, and every reaction has different properties at different temperatures, so this mostly arbitrary 25 degrees makes it easier to study other variables.

[Caitlin_Doak_2H]

Room temp is considered to be 25 degrees C!

[Nicole Weinstein 3E]

Hello!
25 C is the standardized placement for temperature, especially in the kind of reactions we are working through right now