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Q: (a) Name the following compound including E,Z and R,S designations. Following are the factors affecting vapour pressure: Nature of liquid: Vapour pressure of various liquids depend fairly upon the nature of liquids i.e on sizes of molecules. ln(P_(vap))=-(DeltaH_(vap))/R(1/T)+C The expression of vapour pressure is given by: ln(P_(vap))=-(DeltaH_(vap))/R(1/T)+C where, DeltaH_(vap) is the enthalpy of vaporization and it is a constant for a specific liquid. If the container is closed, and then filled with the liquid, the vapor pressure decreases as the container is filled. Three common factors that influence vapor press are surface area, intermolecular forces and temperature. Related. Let us help you simplify your studying. 2 Answers. If the intermolecular forces are strong then molecules will not easily leave the liquid surface resulting in low vapor pressure. The Microscopic View -intermolecular forces-temperature. 1. Factors That Affect Vapor Pressure. IMFs definitely affect VP! Based solely on this data, determine which compound poses the greater risk of fire and explosion at 68ºF (20ºC). Answers. It is the pressure exerted by pure component at liquid at any temperature when both vapor and liquid exists. Therefore, for a liquid with strong intermolecular forces, not a lot of vapor will be formed and the vapor pressure will be low. A voltmeter is primarily used to measure. A liquid standing in a sealed beaker is actually a dynamic system: some molecules of the liquid are evaporating to form vapor and some molecules of vapor are condensing to form liquid. As a liquid is heated, its vapor pressure increases until the vapor pressure equals the pressure of the gas above it. Vapor pressure depends on various factors, the most important of which is the nature of the liquid. III. (a) of simple vapor compression cycle, condensation process CD resulted in the liquid at saturated state D. If it was possible to further cool down the liquid to some lower value say upto D’, then the net refrigeration effect will be increased as (h B – h’ A) > (h B - h A). Question 12 This is a two-part question: Part 1: Methanol and toluene are flammable liquids whose vapor pressures at 68ºF (20ºC) are 96 and 22 mmHg, respectively. The vapor pressure of a liquid is the pressure exerted by vapors of liquid on the surface of liquid when equilibrium is attained between liquid and its vapor. If you are having trouble with Chemistry, Organic, Physics, Calculus, or Statistics, we got your back! Three common factors that influence vapor press are surface area, intermolecular forces and temperature. Answer: Vapor pressure is independent of humidity. NO surface area of liquid. Accounting. Intermolecular forces are the forces that hold two or more atoms in a molecule. The vapor pressure of a molecule differs at different temperatures. 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