I'm a bit confused by this. For an ideal gas under pressure of n moles. If some amount of energy is added Q and the temperature increases dT how do you find Cv ?
Molar heat capacity for pressure i can find with Cp = Q/dT but i am trying to understand how to also find Cv so i can then determine if the gas is monatomic or diatomic with given values. Via the ratios Cp/Cv = 1 + 2/f
Hope some one can help explain this a bit as i've struggled to understand this topic at the moment.