Identify the gas

[Firye Stanly]

Homework Statement

For some gas specific heats for constant pressure and constant volume are calculated. Universal gas constant is R. Find the formula the helps identify the gas. Include only constants and given information.

Homework Equations

3. The Attempt at a Solution [/B]
Molar specific heat at constant volume is $Q=C_vnRT$ and for constant pressure is $Q=C_pnRT$. Is there anything i can use to find that which can help me identify the gas? And what that might be?

 

[mfb]

C_v and C_p are different for different gases. Do you have specific values? Otherwise I don't see how to proceed apart from "look it up in a table and hope to identify the gas".