- #1
DannyMoretz
- 9
- 1
Hello everyone,
I just need some help understanding some thermodynamics. So I have 0.25 kg of helium which is compressed from an initial state in a polytropic process with n = 1.3. So its given the change in volume and the initial pressure. I need to find the change in internal energy. I am aware of the relationship ΔU = m . Cv . ΔT ... and I know that Cv = 3R/2, but can I use that particular internal energy equation, considering Cv is the specific heat capacity of helium at a constant volume, even though volume changes in this process ? Am I just misinterpreting the meaning of this ?
Thanks :)
I just need some help understanding some thermodynamics. So I have 0.25 kg of helium which is compressed from an initial state in a polytropic process with n = 1.3. So its given the change in volume and the initial pressure. I need to find the change in internal energy. I am aware of the relationship ΔU = m . Cv . ΔT ... and I know that Cv = 3R/2, but can I use that particular internal energy equation, considering Cv is the specific heat capacity of helium at a constant volume, even though volume changes in this process ? Am I just misinterpreting the meaning of this ?
Thanks :)
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