- soluble gases mix homogeneously. Lesson 13.2 The intermolecular bond concept: vapor pressure, viscosity, and surface tension are determined by strength of molecular attraction. electrons in a nonpolar molecule are constantly shifting about. Dispersion force - temporary dipole attractions that can occur between nonpolar molecules. dispersion forces occur frequently for short periods of time.
At this point the can will collapse. Alternatively, the same concept can be demonstrated by adding water to an Erlenmeyer flask, heating the water to a boil and quickly placing a balloon over the mouth of the flask. When the flask is then submerged in ice water the balloon collapses inside the flask. Beaker Bunsen burner Discussion: Boyle’s Law describes the relationship between volume and pressure of gases. The volume of a gas varies inversely with
Use the postulates of the kinetic theory to explain the following: i)Matter can exist in three states ii)The pressure exerted by a confined gas decreases as its temperature is lowered iii)A gas of low molecular mass will diffuse through air faster than a gas of high molecular masseven though both are at same temperature. The Kinetic Theory can be used to describe the three physical states of matter namely, solid, liquid and gas. In this theory, some basic assumptions has to be made: a) all matter is made up of extremely small particles b) these particles are in constant random motion c) all collisions between these particles are elastic, and d) mutual attractive forces exist between particles The explanation below gives more information about the three states of matter: i) solids > particles are held together in a regular pattern by strong attractive forces. > particles vibrate about in fixed positions. ii) liquids > vibrating particles have sufficient energy to move from their fixed positions to other parts within a liquid.
Marshmallows and Balloons Reveal a Change in Volume Due to Increasing and Decreasing Pressures Chemistry Period 1 20 February 2013 Chemistry- Per.1 20 February 2013 Marshmallows and Balloons Reveal a Change in Volume Due to Increasing and Decreasing Pressures INTRODUCTION Pressure can define the amount of volume in an object depending on how much is used, hence Boyle’s Law. Some scientists have tried to understand the different ways that gases work. Boyle is one of the scientists that experimented with gases; he states that whenever the pressure of a gas increases, the volume of the gas will decrease, and vise versa. Demonstrated in Mr. Squiddy’s demo, when the bottle was squeezed he would float down and when it was released he would float back up. Some might think that by squeezing the bottle, Mr. Squiddy would go up with the water however, he would go down due to the pipette being used.
The candle wax burns as a vapor because when the smoke it’s put into the other flame, the flame gets bigger which means it’s feeding off of the smoke. That means wax has to burn as a vapor because it’s the only thing present. 3. The other requirement is oxygen because when the flask was put over the flame, the flame went out when the flask became a vacuum before the water reached the flame. 4.
Distillation is a liquid purification process using heating and cooling. Real World Application Vapor pressure is used in distillation to purify a compound by separating it from non-volatile material. The lowering of the vapor pressure causes molecular movement along the surface of a liquid and through processes of evaporation and vapor cooling; the compound is separated and distilled into its purer forms. Distillation there are many uses for colligative properties in the real world, and decreasing of vapor pressure is among the many that are implemented into modern techniques and technology today. "Colligative Properties of Solutions."
They changed because the molecules of hydrogen and helium were moving so fast that they eventually escaped the Earth. 14. Explain how the greenhouse effect works and how it relates to global warming. The greenhouse effect is when radiation at visible wavelengths passes freely through the atmosphere and is absorbed at the ground. The ground heats up and emits infrared radiation.
Are they all moving at the same speed? 2. How do the particles interact with the walls and lid of the container? These interactions contribute to the pressure on the walls of the container. Pressure is defined as force per unit area.
As the volume increases the pressure decreases 2. Once the molecules are so tightly packed, that there is no more space left between the particles to move around. The gas would turn into a liquid. And since liquids are generally incompressible, you would reach a point that the volume cannot be decreased any further. Part II: Charles Law Lab A sample of gas is sealed in a closed container with a moveable lid and an attached heater.
They are indirectly related as one increases the other decreases and vice versa 2. Do you think there is a point at which volume cannot be decreased any further for this sealed container of gas? Explain your answer in terms of what you know about the properties and characteristics of gases. Yes because there will come a point when the container can no longer be put add more pressure because it has a limited amount of space. Part II: Charles’s Law Data and Observations: Present all relevant data in a data table below.