Chem 1212L-345 Lab report Experiment #20: Temperature Change and equilibrium Woochul Jin Jeeyoon Kong‚ Alla Asmerom Hagos 03/22/2011 Woochul Jin Chem 1212L-345 Experiment #20 Lab Report Temperature change and equilibrium Introduction: In this experiment‚ we will find out how the variation of the value of an equilibrium constant with temperature can be used to determine the enthalpy (heat)‚ entropy (randomness)‚ and free energy (G) changes associated with the system in question
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1. Assume that you have 100 years of continuous temperature records from your local weather service office. Discuss some of the difficulties you might have trying to determine whether average temperatures have increased during this period. 2. What are meant by the terms positive and negative feedback mechanisms? Give an example of a process that would be considered a positive feedback mechanism during a period of warming on the earth. Can you think of a negative feedback mechanism? 3. Discuss
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PHYSICS FORM: 4D & 4E TOPIC: THERMAL PHYSICS Temperature determines the direction of net heat flow. It is the property o f an object. It’s the amount of kinetic energy a body possesses. Example Brass rod made hot at one end by placing it in a Bunsen flame‚ while other end is kept away at room temperature‚ there is a net transfer of energy from the high temperature region to the low temperature end. THERMAL EXPANSION (See chp. 16 in Physics Text). Three states of matter are solids
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plus Equation 2(reversed) will equal Equation 3. In this case‚ Hess’s Law gave the ΔH for Equation 3. The last important concept covered in this lab is calorimetry. Calorimetry is the science of measuring heat‚ and is based on observing the temperature change when a body absorbs or discharges energy as heat. A
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poikilotherm as its body temperature fluctuates based on its surrounding environment. Like most fish‚ the goldfish depends on a balanced metabolism to survive; therefore‚ it is important to understand the relation that these poikilotherms have with their environment. An environmental factor that regulates metabolism is temperature. Since fish have temporal ranges that determine their overall success it is important to understand their metabolic process at various temperatures. Other studies show that
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Study sheet for the test G.01: Thermo-chemistry I. Temperature and Thermal Energy Temperature is a measure of the average kinetic energy of the particles in a sample of matter. The greater the avg. kinetic energy of the particles in a sample of matter‚ the higher the temperature of that matter. Some temperature scales are Fahrenheit‚ Celsius and Kelvin. Thermal energy is the measure of the total kinetic energy in a sample. And Temperature is a measure of the average kinetic energy. Ex: Which
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determine the temperature change (∆T) for a neutralization reaction as follows. In the laboratory‚ you will measure time-temperature data at alternate 30-s intervals over a 5-min period for measured volumes of NaOH solution and of HCI solution. After you mix the two solutions‚ you will collect time-temperature data at 5.5 min and then at 1-min intervals over a 15-min period for the mixture. From time-temperature graphs of these data‚ you will find AT. You will plot the temperature in degrees Celsius
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water while keeping the cork above water level. As the gas evaporates‚ excess gas will be released throughout the whole in the cork. Keep the test tube in the hot water for at least three minutes after all the liquid has vaporized and measure the temperature of the water. • Quickly cool the test tube in an ice bath‚ dry it off and find the mass of the test tube‚ cork‚ and condensed liquid.
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stands to lose. Temperature is the main factor that comes into play. Low ambient temperatures wreak havoc on the car’s gasket and force Carter Racing to abandon races early. This becomes readily apparent when temperatures below 60° are plotted against gasket failures‚ as in the figure below. Variance in this case is calculated as .6447‚ which means that the independent variable (temperature) has a 65% effect on the dependent variable (gasket failure). Note that temperatures above 60° are ignored
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hypothetical reasoning‚ in Part A there will be a difference in solar absorption between the color variances‚ leading to differences in temperatures between the different colors of gum. In addition‚ in Part B there will be less solar absorption than in Part A‚ leading to the temperatures of the gum in Part B to be less hot. Materials: (1) Lab Quest Thermometer with Temperature Probe (3) Pieces of Black 5 Gum (3) Pieces of Green 5 Gum (3) Pieces of Blue 5 Gum (1) Heat Lamp (1) Ring Stand (1) 12”x12”
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