![W_logo_color_pos_RGB logo](/images/default-source/brand-portal/logo/w_logo_color_pos_rgb.png?sfvrsn=1a0a3c43_3)
In thermal physics and thermodynamics, the heat capacity ratio, also known as the adiabatic index, the ratio of specific heats, or Laplace's coefficient, is the ratio of the heat capacity at constant pressure (CP) to heat capacity at constant volume (CV).