1. Can anybody PLEASSSEE tell me why 25*C is considered to be the normal room temperature??

tix is such a !*&^%\$ question!!!

2.

3. I don't think it is. Between 20 and 25, maybe: Room temperature - Wikipedia, the free encyclopedia

4. Standard temperature and pressure calls for 25 degrees C, not 'normal.'

5. Yeah, 25 C is way too warm for me, I prefer 20. But that's not what STP is, it's 0 C and 1 atmosphere. That's the reference point from which gas laws are derived. Nowhere does it say that it's room temperature.

Technically, room temeperature is whatever the temperature of your room is

6. Originally Posted by MeteorWayne
Technically, room temeperature is whatever the temperature of your room is
I remember seeing a sign in a supermarket in Singapore pointing out that red wine should be drunk at "room temperature" and therefore you might want to put it in the refrigerator for a while before opening it.

7. 25 C by convention 0nly

8. Merriam-Webster's Medical Dictionary defines "room temperature" as from 59°F to 77°F (15°C to 25°C). Mid-range is 68°F (20°C).
(source)

9. Originally Posted by Ots
Standard temperature and pressure calls for 25 degrees C, not 'normal.'
According to Wiki,

Standard laboratory conditions
"Due to the fact that many definitions of standard temperature and pressure differ in temperature significantly from standard laboratory temperatures (e.g., 0 °C vs. ~25 °C), reference is often made to "standard laboratory conditions" (a term deliberately chosen to be different from the term "standard conditions for temperature and pressure", despite its semantic near identity when interpreted literally). However, what is a "standard" laboratory temperature and pressure is inevitably culture-bound, given that different parts of the world differ in climate, altitude and the degree of use of heat/cooling in the workplace. For example, schools in New South Wales, Australia use 25 °C at 100 kPa for standard laboratory conditions.[30]"

10. It's by CONVENTION so everybody is at the same referrence point- How difficult is that?

11. Originally Posted by fizzlooney
It's by CONVENTION so everybody is at the same referrence point- How difficult is that?
Except there is no conventuion, really. Different organizations use different reference points:

Standard conditions for temperature and pressure - Wikipedia, the free encyclopedia

Room temperature - Wikipedia, the free encyclopedia

12. What room?

14. ......Lol!

15. Commonly, it's considered in the range of 18°C (64°F) to 23°C (73°F)