Editing Isobaric process (section)

==Specific heat capacity==
To find the molar specific heat capacity of the gas involved, the following equations apply for any general gas that is calorically perfect.  The property ''γ'' is either called the [[adiabatic index]] or the [[heat capacity ratio]].  Some published sources might use ''k'' instead of ''γ''.

Molar isochoric specific heat:
:<math>c_V = \frac{R}{\gamma - 1}</math>.

Molar isobaric specific heat:
:<math>c_p = \frac{\gamma R}{\gamma - 1}</math>.
The values for ''γ'' are ''γ''&nbsp;=&nbsp;{{sfrac|7|5}} for [[diatomic]] gases like [[Atmosphere of Earth#Composition|air and its major components]], and ''γ''&nbsp;=&nbsp;{{sfrac|5|3}} for [[monatomic gases]] like the [[noble gas]]es. The formulas for specific heats would reduce in these special cases:

Monatomic:
:<math>c_V = \tfrac32 R</math> and <math>c_P = \tfrac52 R</math>

Diatomic:
:<math>c_V = \tfrac52 R</math> and <math>c_P = \tfrac72 R</math>

An isobaric process is shown on a ''P''–''V'' diagram as a straight horizontal line, connecting the initial and final [[thermostatic]] states. If the process moves towards the right, then it is an expansion. If the process moves towards the left, then it is a compression.