Describe the appearance of the flame when the air vents are opened. When the air vents (collar) are opened, the air mixes with the gas and makes a more complete combustion reaction. This results in a hotter reaction, with a light blue colored flame. 6. What apparatus is used in this demo to test how hot the flame is?
Heat Of Combustion Of Candle Wax Purpose: The purpose of this experiment was to determine the amount of heat that was released when a gram of candle wax burns. Materials and Equipment: Empty pop can Candle attached to a piece of cardboard Celsius thermometer Ring stand Iron ring Stirring rod 250mL beaker 100mL graduated cylinder Ice Data and Observations: Mass of pop can and water: 149.88 grams Mass of empty pop can: -14.05 grams Mass of water in pop can: 135.83 grams Mass of a candle stuck to a piece of cardboard: 31.77 grams Mass of candle and cardboard after candle burned: -31.01 grams Mass of candle burned: 0.76 grams Final temperature of water in pop can: 35.0 (C Initial temperature of water in pop can: -9.5 (C Change in temperature: 25.5 (C Calculations: q = m ( c ( (T q(# of cal. or joules absorbed by the water) = m(mass of water in grams) ( c(1 cal./1g 1(C) ( (T(change in temp. (C) c = 1.00 cal/g (C or c = 4.18 J/g (C Conclusions and Questions: 10. (a.)
Oxygen: B. Reacts the same as hydrogen with gas bubbles rising to the surface. F. I believe we fill the gas generator test tubes almost to the top with the chemical s to eliminate as much air as possible and to speed up the gas transfer to the pipet. 3. Hydrogen and Oxygen Mixture G. A balanced equation for the reaction between Hydrogen and Oxygen is 2H2 + O2 -- 2H2O Data Table: Experiment Results | Gas | Flame reaction | Glowing splint | Limewaterreaction | BromothymolBlue reaction | Hydrogen | Small Poof with flame, then blew flame out | | | | Oxygen | | Glowing splint flamed back up when inserted | | | Hydrogen & Oxygen | | | | | Carbon Dioxide | Puts the flame out | | Turns the limewater a milky color | Turned the blue water to a yellow color | Alka Seltzer | | | Increased the volume of the water/add CO2 | | Breath | | | I saw no reaction | | Questions: Questions: A. We fill the gas generator tubes almost to the top to eliminate as much air as possible and speed up the gas transfer to the pipet.
Calorimetry 23.04.2011 Introduction: An experiment to determine the efficiency of thermal energy gained while heating water by burning alcohol. Aim: To calculate and analyse the efficiency of the energy transfer when heating water in a calorimeter. Hypothesis: There will be an energy transfer when the alcohol is burned to heat the water. Materials: • Clamp • Spirit burner • Scales • Thermometer • Calorimeter • 30cm3 distilled water Method: • The clamp was set up to hold the calorimeter. • 30cm3 of distilled water was poured into the can.
PURPOSE/INTRODUCTION The purpose of this experiment is to produce visible emissions from heating different metal fluorides with a Bunsen burner. The hypothesis is that by warming the different metal chlorides, the different elements found in each chloride will produce a different color when placed in the flame. We will also produce a table of our findings with our information we recorded from the results gathered in this lab. In the preceding discussion, we will be testing different metal chloride reactions when a flame is introduced to them. MATERIALS * One Bunsen burner * 1 gram of Sodium Chloride * 1 gram of Potassium Chloride * 1 gram of Lithium Chloride * 1 gram of Barium Chloride * Nichrome wire (wire with a loop) * 0.4 grams of water * Protective eyewear * Lab gloves Barium is a toxic metal, be sure to wear gloves and goggles when handling this material, also if using a Bunsen burner be sure to turn of the gas.
Then, stand the cylinder upside down after measuring the lighters and then, placing the lighter near the cylinder while releasing butane into the cylinder. When the butane is released the amount of water is decrease this show the amount of butane that is in the cylinder. Data Table and Calculation 1: Trial 1 Trial 2 Mass of lighter before experiment (grams) 22.03 grams 21.84 grams Mass of lighter after experiment (grams) 21.77 grams 21.62 grams Volume of butane release (mL) 100.3 mL 100.0mL Temperature of water (°C) 23.0 °C 24.5°C Room temperature (°C) 21.1°C 21.1°C Atmospheric pressure (torr) 764 torr 764 torr Molecular mass of Carbon (grams) 12.011grams 12.011grams Molecular mass of Hydrogen (grams) 1.0079 grams 1.0079 grams Butane Formula C4H10 C4H10 Average mass of lighter before experiment (grams) 21.94 grams 21.94 grams Average mass of lighter after experiment (grams) 21.70 grams 21.70 grams Average temperature of water (°C) 24.0 °C 24.0°C Water pressure at 24.0°C 22.38 torr 22.38 torr Average of the volume of butane 100.15 °C 100.15
Now to find this we would also have to look at the heating curve of the experiment. Also we have to look for when and how the physical change from a solid to a liquid (melting) happens to the Lauric Acid. * A heating curve is when you supply heat to an isolated material over a certain amount of time. To see the heating curve you must graph to noticeable see the rise and stabilization of the heat within the material. Also to further example this lab, Phase Change is when one state of matter changes to another state of matter through either endothermic or exothermic change.
hoSpecific heat capacity in liquids Specific heat capacity in liquids How do liquid filled radiators work and what are the useful properties of these liquids? Liquid-filled electric radiators are sealed units that have an internal heating element that releases heat through the outer case; however the elements are put in a liquid such as: oil, water or heat transfer agent. Depending on the design of the radiator, the heat generated can be through radiation or a combination of radiation and convection (1). (10) (10) The liquid used is anti-freeze which is made up of ethylene and propylene glycol (13). Ethylene glycol is mixed with water so it is 50% of each liquid in the solution and has the highest boiling point than any other radiator fluid (5); its boiling point is 197.3°C and has a melting point of -12.9°C (12).
They go in order of the rainbow; red being the weakest and violet being the strongest. PURPOSE: The purpose of this experiment is to burn atoms of a metal using a flame burner to see how much energy a photon releases by the color of light emitted. Also by observing the photon; the ability to specify an unknown substance will be available. PROCUDURE: Seven well plates were obtained and labeled with the name of the known substances. In each well plate place a small amount of known substances into the well plate.
Chemical Agents Oxidizer, what is an oxidizer? The word "burning" describes the oxidation of a fuel in air. A campfire, for instance, uses oxygen from the air to turn wood (cellulose) into steam (H2O) and carbon dioxide (CO2), among other things. So why do fireworks need an oxidizer? Simply because our atmosphere doesn't provide the chemicals with enough oxygen (O2) to sustain the rapid rate of burning that fireworks require in order to give off color, shoot into the air, or explode.