using gas constant R

[Vanessa Reyes_1K]

For which equations will we use just R versus using 5/2R and 3/2R for an ideal gas?

[Zenita Leang 2K]

You use 3/2R for Cv, when volume is constant in a reaction. This is seen in deltaS=nClnT2/T1. You use 5/2R for Cp when pressure is constant in a reaction, this could be used in the same equation.

[Brian Chhoy 4I]

I dont think R is ever used as a C value in the entropy equation as temperature changes. The C value also changes depending on the shape od the molecule. Th R value by itself would mostly be used in the work equation for reversible work.

[Bruce Chen 2H]

You use 3/2R for when volume is constant and then 5/2R and 3R depending on the type or molecule. You use 5/2R when pressure is constant and then 7/2R and 4R for each subsequent shape.

[ran2000]

5/2 R= C when the pressure is constant
3/2 R= C when the volume is constant