Experiment :12 Vapor Pressure and the Heat of Vaporization Nicole Petersen TA: Ryan Dixon 4/16/2013 Purpose: Use experimental techniques to record temperature and volume data for known and unknown compounds. The liquid and gas are going to be at equilibrium. We will also determine the boiling point for the known and unknown. Then use a graph to calculate the slope and then use Clasius- Clapeyron equation to find the heat vaporization. Procedure: Refer to pages 155-167 of Chemistry 1210 General
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dichloromethane and the solution was poured into a separatory funnel. 2. 20 ml of aqueous sodium bicarbonate solution was added to the dichloromethane. A stopper was placed on the separatory funnel and was shaken and pressure was frequently released. The 2 liquids separated into clear layers and the lower layer (dichloromethane layer) was tapped into an Erlenmeyer flask. The aqueous layer was placed into a 400 ml beaker. The dichloromethane was placed back in the separatory funnel. 3. The dichloromethane was
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How are crystals grown? You have created a supersaturated solution by first heating a saturated sugar solution and then allowing it to cool. A supersaturated solution is unstable; it contains more solute than can stay in a liquid form‚ so the sugar (the solute) will come out of solution. Then evaporation occurs as time passes‚ the water will evaporate slowly from the solution. As the water evaporates‚ the solution becomes more saturated and sugar molecules will continue to
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To provide heat to dry products Why is it necessary to atomise fuel? Even though fuel oil is classified as a flammable liquid‚ most fuels will not burn easily in a liquid state. If you were to drop a lit match in a container of fuel oil‚ it would PROBABLY go out almost immediately (don’t try this!). In order for fuel oil to burn‚ it must first be transformed from a liquid to a vaporised state ~ atomised. Atomisation increases the exposure of the fuel to the oxygen in the air; this promotes combustion
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metal alloys are classified as Division 4.1 when they can be ignited and the reaction spreads over the whole length of the sample in ≤ 10 minutes. Division 4.2 – Spontaneously Combustible include the following categories: • Pyrophoric materials – liquids or solids that can‚ without an external ignition source‚ ignite within 5 minutes after coming into contact with air. • Self-heating materials – substances that‚ when in contact with air and without an energy supply‚ are liable to self-heat. A material
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1. Label heating curve graph of a substance other than water (NOT WATER‚ make up a substance if you have to‚ but don’t use 0 oC and 100 oC The graph must include: • An illustration (not fancy) of how the molecules are arranged in the solid phase‚ liquid phase‚ gas phase and during the phase changes. • How KE and PE change during different parts of the graph. • Labels for each part of the graph with an appropriate equation. • Labels for the melting point and boiling point. The information may
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“column” while the hot water sprayed into the system. Since air is never at full saturation of water (unless it is raining)‚ some of the hot water will evaporate to satisfy equilibrium. When this water evaporates‚ heat is taken from the surrounding liquid water which cools it down. In cooling tower design‚ a very important variable is the wet bulb temperature of the air. The wet bulb corresponds to the current humidity of the air. The greater the difference between the air temperature and wet bulb
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the transmission fluid level. At this point check all the exterior lights to see if they need to be replaced. Turn the engine off‚ and check the oil level to see how low it is if at all. Take this opportunity to check the air filter for dirt and liquid. Typically check the air filter every two to three oil changes. It is a good idea to note brake fluid‚ power steering fluid and washer fluids levels before moving underneath the car to drain it. Having checked all the fluids and minor
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Institution: Medgar Evers College - CUNY Course: Public Speaking/Speech Date: February 15‚ 2014 How To Make A Lava Lamp I. INTRODUCTION A. Attention Getter: Have you ever caught yourself being hypnotized by a lava lamp? How the liquid separates and form different shapes and colors. Excited at the thought of owning one‚ but then you look at the price tag - and put it back. B. Purpose Statement: Today I will show you how to make a lava lamp using common household items. C. Preview
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Butter lab 1 Introduction: While doing this experiment we used 3 terms. We used cream‚ butter‚ and butter milk. Cream is unhomogenized butter. Butter is what we got after the lab was finished. Butter milk is the milk around the butter after it is homogenized and it is thicker than normal milk. If we shake the cream in a jar than will it turn into butter? If I shake the cream than it will turn into butter because it will homogenized. In this lab you will shake a jar of cream and see if will
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