FIRE RESISTANT BALLOON: Materials - 1 matchbox - 1 candle - 1 yellow colored balloon - 1 blue colored balloon - Half a cup of water Procedure: 1. For this experiment‚ the independent variable is whether the balloon is filled with water or not. The dependent variable is what happens to the balloon when it is placed above the lit candle. This is determined by observing the balloon. The constants (control variables) are how much the balloon is inflated and the amount
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INTRODUCTION Given appropriate chemicals and equipment‚ the specific heat capacity and molar mass of a metal‚ enthalpy of neutralization of an acid and base‚ and the enthalpy of solution of an unknown salt can be determined by following specific procedures. All of these procedures require the use of a calorimeter‚ which are of two types: a bomb calorimeter and a coffee cup calorimeter. Calorimeters are simply devices used to measure the amount of heat gained or lost in a system. Although this
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efficiency of the combustion depended on the fuel to oxygen ratio. If mixture was fuel lean the combustion reaction would produce less soot and smoke. If the mixture was fuel rich‚ an incomplete combustion reaction occurred and it produced plenty of soot and smoke. The controlled variable was the amount of water in the test tube. If there was more water in one test tube and less water in the other‚ then it could affect the accuracy of the fuel to oxygen ratio and the outcome of the experiment. b) Why was
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Molecular Mass Changes in Heat Combustion of an Alcohol Planning Introduction ============ As alcohol burns in air it gives out energy as heat and light. I am going to investigate how the energy output of an alcohol in combustion changes‚ with increased relative molecular mass‚ or RMM. RMM is the sum of the atomic masses of every atom in the molecule. Using the alcohols: Methanol‚ Ethanol‚ Propan-1-ol‚ Butan-1-ol and Pentan-1-ol‚ I will plan‚ and complete an experiment that tests
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Calculating the Enthalpy Change of Reaction for the Displacement Reaction between Zinc and Aqueous Copper Sulphate Data Collection and Processing Observations: * Drops of water left on the inside of the measuring cylinder * Hole in the lid‚ possible escape route for gas or splash-back * The polystyrene cup felt warm during the reaction By extrapolating the graph we can estimate what the rise in temperature would have been if the reaction had taken place instantaneously. I can
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1. INTRODUCTION Have you been to the gas station this week? Considering that we live in a very mobile society‚ it ’s probably safe to assume that you have. While pumping gas‚ you ’ve undoubtedly noticed how much the price of gas has soared in recent years. Gasoline which has been the main source of fuel for the history of cars‚ is becoming more and more expensive and impractical (especially from an environmental standpoint). These factors are leading car manufacturers to develop cars
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loss from the hot water from combining it with the cold water. As discussed in a page titled Heat Capacity2‚ the heat capacity is defined as the amount of heat it takes to raise the temperature of a substance by one degree (in this case C). In the experiment performed in lab‚ the heat capacity of the calorimeters was calculated by subtracting the heat gain from the heat loss and then dividing that by the difference in the temperatures between cold water and the combination of the hot and cold water
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fuel saving techniques employed by drivers. "You can do a lot as far as saving fuel is concerned by taking certain steps‚" said Devendra‚ an auto expert. He advised that air filter should should be cleaned regularly for better flow of air into the combustion chamber for igniting the fuel better. "This step can easily save fuel‚" he added. Similarly‚ owners should go for regular cleaning of fuel filter for a proficient compel. He‚ however‚ admitted that vehicle owners have now become more aware as far
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Combustion of Gummy Bears Energy is a concept.� Most definitions of the word energy fail to provide its exact meaning when applied to scientific matters.� In science the word energy is a concept that expresses two measurable properties‚ heat and work.� Here is the relationship of energy‚ heat and work: Energy Released=Work Done + Heat Released The Law of Conservation of Energy‚ derived from centuries of observation and measurement‚ indicates that energy cannot be created or destroyed. But energy
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Calorimetry Experiment Purpose: The objective of this lab is to determine the enthalpy change for NaOH(aq) + HCl(aq) NaCl (aq) + H2O(l) Procedure: Before measuring the enthalpy of acid base neutralization‚ my partner Brian and I determined a calorimeter constant‚ using a homemade polystyrene calorimeter. With the following formula and data: qhot= cm (Tf-Ti) qcold=cm(Tf-Ti) SYSTEM DATA SURROUNDINGS DATA Water cold Mass: 50mL Water hot Mass: 50mL C=4.18 C=4.18 Ti=20 C Ti=31
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