A white whiteboard, framed with light gray metal, is covered extensively with handwritten thermodynamic equations, diagrams, and schematics in blue marker ink

A white whiteboard, framed with light gray metal, is covered extensively with handwritten thermodynamic equations, diagrams, and schematics in blue marker ink. The content includes pressure ratio calculations, ideal gas law formulas (PV=RT), integral expressions for work (e.g., W = ∫v dP), and multiple P-v and T-s cycle diagrams, some with hatched areas indicating specific processes or quantities. States within these cycles are labeled numerically (1, 2, 3, 1', 1''). Schematic drawings resembling piston-cylinder arrangements or flow devices are also present, accompanied by associated pressure and temperature conditions. No individuals are present in the image. A rectangular blue eraser rests on the lower right ledge of the whiteboard. The scene is located within an educational facility in Ash-Shaghour Municipality, Syria.