![W_logo_color_pos_RGB logo](/images/default-source/brand-portal/logo/w_logo_color_pos_rgb.png?sfvrsn=1a0a3c43_3)
The first law of thermodynamics is a version of the law of conservation of energy, adapted for thermodynamic processes, distinguishing two kinds of transfer of energy, as heat and as thermodynamic work, and relating them to a function of a body's state, called Internal energy.