User talk:Kunal10103

INTRODUCTION Diffusion, simply put is the simple process of a group of molecules being distributed among a closed space, instead of being at one place, all huddled together. In other words, the molecules are moving from an area of relatively high concentration, to an area of relatively low concentration, until the molecules are in a uniform concentration, known as equilibrium. Diffusion happens around all the time, everywhere. A simple example of diffusion is the spreading of food coloring when it is dropped into water, or the spreading of cigarette smoke, throughout the air, and dissolving. Both involve the spreading of molecules in a closed space, to a larger space; thus moving from an area of high concentration to an area of low concentration. Source: https://missbakersbiologyclasswiki.wikispaces.com/file/view/diffusion.gif/31772061/diffusion.gif This diagram clearly represents the simple mechanism of diffusion, where all the molecules are at first condensed in one area, on the left, and the molecules, not wanting to be secluded in area; and thus they begin to move into an area of free space, or into a less populated area. In other words, the molecules are moving from an area of high concentration (heavily populated with molecules) to an area of low concentration (very scarcely populated with molecules). They are many ways to show diffusion, and one of the simplest ways to do so, is through my experiment. My experiment involved a simple showcase of diffusion that happens everywhere: the diffusion of scent, smells, and odor. For example; when an air freshener is sprayed in one area of a room, soon enough the whole room is filled with the scent of the air freshener. Same goes for scented candles, they are placed in one area of the room, and soon the whole room is filled with the great scent of the candle. My experiment used this very mechanism, as it involved comparing the diffusion rates of various different types of smell, from different brands of air fresheners, ranging from Glade and Airwick, to Febreze and Ozium; testing which one is the fastest, and predicting why. By spraying each air freshener for a set amount of time, at a set area, we create a situation for diffusion, as the air freshener molecules are condensed into one area, thus making that area a high concentrated one; and over time the molecules will undergo diffusion, distributing the scent, evenly throughout the room, till it’s in equilibrium. This diagram shows how initially the air freshener was sprayed, it shows initially how the molecules are all condensed, making the area high concentrated. Then it undergoes diffusion, and the molecules spread throughout, reaching equilibrium. My experiment involved using this simple mechanism, to measure the diffusion rates of different brands of Air fresheners. By spraying the air freshener in one end of the room, and measuring the amount of time it takes for it to reach the other end of the room, the diffusion rate of each brand can be calculated, and that is what my experiment shows.

Question Which ‘freshener’ demonstrates the fastest diffusion rate across a particular room? Hypothesis I believe that the one of the air fresheners will have a faster diffusion rate as compared to a scented candle, or incense stick. Due to the fact that the air freshener is sprayed, thus pressurized into one spot, it gives their molecules some kinetic energy, whereas the incense sticks and scented candles, are peaceful, and release their molecules slowly, with relatively less kinetic energy. But which brand of air freshener is the fastest, that I cannot predict. Variables Independent Variable: Source of smell( Different brands of air fresheners, scented candles etc.) Dependent Variables: Speed of Diffusion Control: Distance of the room