CÁLCULO del Descenso de la PRESIÓN DE VAPOR | Propiedades Coligativas | Ley de Raoult

Learn how to calculate vapor pressure lowering. At a given temperature, the molecules of any liquid possess a certain amount of kinetic energy. Some molecules, especially those near the surface, spontaneously transition to the gaseous state, that is, they volatilize. However, as a result of constant collisions between molecules, many of these return to the liquid, resulting in a state of equilibrium between the gaseous and liquid phases of the substance. Now, if the liquid is contained in a closed container, the gaseous fraction will exert pressure on the lid by continuously striking it. This pressure, called vapor pressure, can be measured and is characteristic of each substance. The ratio between the gas and liquid phases depends on the cohesive forces between the molecules. If the cohesion is weak, a large number of molecules will volatilize. Conversely, if the cohesion is strong, very few will. This is what determines why some substances are more volatile than others. Furthermore, vapor pressure increases with temperature because, with greater kinetic energy, more molecules will transition to the gaseous phase. A solution with a non-volatile solute will have a lower vapor pressure than that of the pure solvent. Conversely, if the solute is volatile, the vapor pressure of the solution will be the sum of the partial pressures of the components of the mixture. These relationships are summarized in Raoult's Law, formulated by François Raoult (1830-1901) in 1887. Mathematically, Raoult's Law is expressed as follows when the solute is non-volatile: PA = P₀A * XA Where PA is the vapor pressure of the solution, PA₀ is the vapor pressure of the pure solvent, and XA is the mole fraction of the solvent in the solution. Thus, the more dilute the solution, the smaller the decrease in vapor pressure. 😎Become a member of this channel to enjoy exclusive benefits: 👉🏾   / @laquimicadeyamil   🔔***=====Don't forget to subscribe=====***🔔 I recommend: ⚗️Introduction to Chemistry http://ow.ly/LChb50A98sd ⚗️Atomic Structure https://bit.ly/2YjNJMr ⚗️Inorganic Chemical Formulation and Nomenclature https://bit.ly/30YfJa1 ⚗️Stoichiometry https://bit.ly/2Nde2xi ⚗️Gases and Solutions https://bit.ly/2YUF5CX ⬇️Download free books Chemistry in PDF format: http://profeyamil.blogspot.com/p/desc... Remember you can find me on my social media: 🔵Instagram:   / laquimicadeyamil   🔵Facebook:   / yamilcordobaquimica   🔵Facebook Group:   / aprendamosquimica   Blog: http://profeyamil.blogspot.com/ My other channels: 🟥   / labiologiadeyamil   #ChemistryFromScratch #Chemistry #Yamil'sChemistry #Subscribe My cameras: Canon m200: https://amzn.to/3anrbR4 Vixia HF R800: https://amzn.to/3gYDkNR Logitech C920: https://amzn.to/3nz86zl My fake batteries: Glorich ACK-E12: https://amzn.to/3w7GRzy My Telepromter: Parrot Telepromter: https://amzn.to/3v101a4 My tripods: UBeesize 61.4-inch Camera Tripod: https://amzn.to/3hkZoUP My microphones: Tascam DR-05X: https://amzn.to/34n9VHN Hyperx Quadcast: https://amzn.to/37w5cFI Rode SmartLav: https://amzn.to/39Kx0pR PowerDeWise: https://amzn.to/3uFx2Zf My lights: Mountdog Softbox Kit: https://amzn.to/2Kv1cwI VILTROX L116T: https://amzn.to/3btihRN My computer: Acer Nitro 5: https://amzn.to/2KEGhXy