The vapor pressure of pure liquid CS2 is 0.3914. atm at 20C. When 40.0 g of rhombic sulfur (a. naturally occurring form of sulfur) is dissolved. in 1.00 kg of CS2, the vapor pressure falls to. 0.3868 atm. Determine the molecular formula of rhombic. sulfur. 19. What is the vapor pressure of CS2(in mmHg) at 18.5degree C? Carbon disulfide, CS2, has Pvap= 100mm at -5.1 degree C and change in Hvap = 28.0 kj/mol . General Chemistry Carbon Disulfide (CS2) - Carbon Disulfide is the chemical name of CS2. Carbon disulfide has been used in a variety of industrial applications for well over 100 years. Visit BYJU'S to understand the properties, structure, and uses of Carbon Disulfide (CS2) explained by India's best teachers. Intermolecular forces are the forces of attraction or repulsion that may exist between molecules that are in close vicinity to each other. These forces are responsible for physical properties like boiling point, melting point, density, vapor pressure, viscosity, surface tension, and solubility of compounds.