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Corrosion Control (Basic
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Investigating Factors that Affect the Amount of Heat Produced in Neutralisation I am going to investigate factors that affect the amount of heat
produced in neutralisation. My objective is to plan and conduct an
experiment from which I should be able to draw a firm conclusion that
will either prove or disprove any predictions I have made. The factor
I will be investigating is concentration.
Preliminary Experiment
In order to investigate the factor that affects the amount of heat
produced during neutralisation I will first of all need to conduct an
experiment in order to help choose the equipment that I will be using.
This experiment shall give me clear evidence to what sort of vessel I
shall use during my experiment. I either shall be using a glass beaker
or a polystyrene cup. The vessel that overall I shall be using will be
the one which shall insulate the solution inside its container the
best. I have chosen the glass beaker and the polystyrene cup because I
have found that these two containers are resistant to any sort of
corrosion that might occur whilst I will be using the acid and the
alkalis.
Diagram
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Method
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1. I will first measure out 20ml of 2M Hydrochloric acid and pour it
into the glass beaker.
2. Then I will measure the starting temperature.
3. Then I will out 20ml of 2M Sodium hydroxide add it into the
Two equations were used in this experiment to determine the initial temperature of the hot water. The first equation
The question I was trying to answer is Which balanced chemical equation best represents the thermal decomposition of sodium bicarbonate. Using that question to guide us we were trying to determine which of the four chemical equations show how atoms are rearranged during thermal decomposition. We concluded it was the second chemical equation, we know that because:
However, the increased temperature of the new acid solution was at a greater temperature than the ambient temperature and the temperature of the water. This suggests that some of the results obtained were partially due to the fact that some of the heat energy of the acid was transferred to the water, as well as the hydration of ions present in solution. An improvement would be to create the solutions of desired concentration and allow them to reach thermal equilibrium with the surroundings. This would allow more accurate results and the allow for the assumption that the temperature change observed during the experiment would only be due to hydration of
Hess’s Law is also an important concept in this lab. It states that the enthalpy of a reaction is independent of the steps it takes to go from reactant to a product. It happens because enthalpy is a state function. A state function depends on the initial and final state but not the actual process. The Hess’s Law is used to calculate the heat formation of Magnesium Oxide. The amount of heat necessary to create one more mole of a substance is called the Enthalpy of Formation.
When there is a heat exchange between two objects, the object’s temperature will change. The rate at which this change will occur happens according to Newton’s Law of heating and cooling. This law states the rate of temperature change is directly proportional between the two objects. The data in this lab will exhibit that an object will stay in a state of temperature equilibrium, unless the object comes in contact with another object of a different temperature. Newton’s Law of Heat and Cooling can be understood by using this formula:
Warmer water temperature discharged by waste industrial heat into water can affect many aquatic species that cannot tolerate the warmth. A higher level of temperature can result in low oxygen concentrations by speeding up the rate of decomposition of organic matter. "The discharges are often associated with coal-or nuclear-fuelled power plants, and sometimes with large factories." (H.J. Dorcey). The increase of heat materials dumped into water can increase the temperature level in the water bodies and can affect all living organisms within that body. There are many disadvantaging technology which has been affecting water and raising the water temperature from normal. For example, electric power plants might withdraw water from nearby water bodies for the purpose of cooling in the plant and then return the heated water back to the same water body. This is insanely affecting the regular temperature. If the water is not the same, it can lead to many damages within the water body. For example, fishes will dies exhausted from the warmth and it will also affect other aquatic organisms causing them to boil in the water caused by others, sacrificing these creatures. Water from excessively heating up can be best prevented by using special cooling towers and ponds that disperse the energy into the
In this lab, I determined the amount of heat exchanged in four different chemical reactions only using two different compounds and water. The two compounds used were Magnesium Hydroxide and Citric Acid. Both compounds were in there solid states in powder form. Magnesium Hydroxide was mixed with water and the change in heat was measured using a thermometer. The next reaction combined citric acid and magnesium hydroxide in water. The change in heat was measured as well. For the third reaction citric acid was placed in water to measure the change in heat. In the last reaction, citric acid was combined with water. The heat exchanged was again measured. It is obvious we were studying the calorimetry of each reaction. We used a calorimeter
Theories have often been developed to explain how delinquents violate social norms and still manage to maintain positive self images of themselves. Neutralization theory, developed by Gresham Sykes and David Matza in 1957 set out to do just this. Critics, however, have claims that the theory, on it’s own, is not a sufficient explanation for adolescent’s participation in crime in delinquency. It has also been claimed by critics that neutralization theory is best viewed as a components of larger theory of crime and can be incorporated into other theories such as social bond theory.
Investigation of the heat energy produced by combustion of various alcohols. Aim: ---- To investigate how different alcohols produce different amounts of heat energy through combustion. I will be heating water using different alcohols as fuels and measuring the amount of fuel consumed.
" This means that therefore the enthalpy change of a reaction can be measured by the calculation of 2 other reactions which relate directly to the reactants used in the first reaction and provided the same reaction conditions are used, the results will not be affected. We have the problem set by the experiment to determine the enthalpy change of the thermal decomposition of calcium carbonate. This is difficult because we cannot accurately measure how much thermal energy is taken from the surroundings and provided via thermal energy from a Bunsen flame into the reactants, due to its endothermic nature. Therefore, using the enthalpy changes obtained in reaction 1 and reaction 2 we can set up a Hess cycle.
The concept of displacement reaction of Zinc in cooper sulphate is exothermic, as heat is released out while reacting. A powder substance Zinc reacts faster, when it is added to cooper sulphate solution as the total surface is high. After reaching of the peak, the temperature started falling down, as the solution starts cooling down and Heat is lost in the surrounding. An ideal situation shows the change in temperature, which we can use it in calculations; It is possible that the concentration of copper sulphate was lower and therefore less zinc reacted, releasing less energy than expected. We took four different samples of zinc in order to check the difference in enthalpy. Zinc replaces cooper in cooper sulphate, because it is more reactive and it also has very low solubility. So, this is how with the help of redox reaction we determined the enthalpy change
Effect of Temperature on the Rate of Reaction between Sodium Thiosulphate and Hydrochloric Acid Investigation Chemical reactions are used in our everyday life, they literally keep us alive. They are used in food, respiration and everywhere else in the environment. A chemical reaction mainly occurs when reactants react together to produce a new product. The speed at which this reaction takes place is called the rate of reaction. The product produced has a number of particles in the solution that has formed from the reactants.
During the experiment I will be taking a number of measurements, I will firstly take the initial temperature of the water and initial mass of the alcohol I will then burn the alcohol until an increase in temperature of 20oc has occurred in the water I will then reweigh the alcohol.
Investigating the Effects of Temperature on the Rate of Reaction between Magnesium and Hydrochloric Acid Introduction Chemical kinetics is the study and examination of chemical reactions regarding re-arrangement of atoms, reaction rates, effect of various variables, and more. Chemical reaction rates, are the rates of change in amounts or concentrations of either products or reactants. Concentration of solutions, surface area, catalysts, temperature and the nature of reactants are all factors that can influence the rate of reaction. Increasing the concentration of a solution allows the rate of reaction to increase because highly concentrated solutions have more molecules and as a result the molecules collide faster. Surface area also affects reaction rate because when the surface area of a reactant is increased, more particles are exposed to the other reactant.