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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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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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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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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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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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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graduated cylinder. On the data table created in the first step‚ take note of and record the initial temperature of HCL(aq). Collect no more than 0.80 g of MgO(s) powder. Record the mass on the data table. A group member should then add MgO(s) powder to the calorimeter containing HCL(aq). Make sure to swirl gently. After a certain time when the temperature no longer rises‚ record the highest temperature reached. Dispose of the solution as directed by teacher’s instructions before commencing part 2
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amplifiers is given here. The circuit automatically switch ON the cooler fan whenever the temperature of the heat sink exceeds a preset level. This circuit will save a lot of energy because the cooler fan will be OFF when the amplifier is running on low volume. At low volume less heat will be dissipated and it will not trigger the cooler fan ON. The temperature is sensed using an NTC (negative temperature coefficient) thermistor R2. Junction of thermistor r2 and resistor R1 is connected to the inverting
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