[pyrrole]

Hello,

I'm really stuck with this question...

Calculate kt and ks for Ar and N2 at a pressure of 1Mpa, assuming gases are perfect.

So Kt, is independent of heat capacity, and just 1/P  (1/1x10^6)

But Ks is dependent on heat capacity. = 1/p (1-R/Cpm)

But i dont know how to calculate Cp from the question. Cp = R + Cv. But i dont know Cv. I've been going round in circles with this for ages. Somebody please put me out of my misery.

[pyrrole]

Ks = pressure / density^ratio of heat capacities

Is that correct? The ratio of heat capacities is equal for a perfect gas? Is that what i do?

So rearrange perfect gas eqn to get volume, then from that and molar mass calculate density for each gas. and then divide pressure by respective desities?

[pyrrole]

Can no one help?