Is the product of PV has SI unit of atmdm^3?if no why?

1 Answer
Ananda Dasgupta
Apr 2, 2018

No. The Si unit for #PV# is Joules

Explanation:

While atm is a unit for pressure - it is not the standard SI unit for pressure. Pressure, after all, is force per unit area. So, its unit in the SI system is the unit of force, Newton, divided by the unit of area - square meter. This unit has a name - it is called the Pascal, after Blaise Pascal - the seventeenth century French physicist/ mathematician/ theologian.

#1" Pa" = 1 " N"\ "m"^-2#

The SI unit of #PV# is then

#1" Pa" times (1" m")^3 = 1 " N"\ "m"^-2times 1" m"^3 = 1 " N"\ "m" = 1" J"#

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