When doing calculations, should pressure be in atm or Pa?

[Lee]

When doing calculations, should pressure be in atm or Pa? (looking for answers in joules)

 

[zaguar]

Doesn't matter AFAIK as long as you adjust the constants for example R in PV=nRT.

 

[Lee]

Good'o. I just wanted to double check.

 

[Max Eilerson]

Use Pascals. P = F / A, Force is usually given in Newtons amd 1 Pa = 1 Nm^-2.

edit: should read the thread title, good practice anyway :).

 

[ppithermo]

all you need is to have is consistent units.
pressure in Pa, volume in cubic meters and R = 8.3145 J mol^-1 K^-1
then work will be in joules

 

[dextercioby]

Always choose the path with the least number of conversions.

Daniel.