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Early scientists explored the relationships among the pressure of a gas (P) and its temperature (T), volume (V), and amount (n) by holding two of the four variables constant (amount and temperature, for example), varying a third (such as pressure), and measuring the effect of the change on the fourth (in this case, volume).
28 Μαΐ 2020 · Pressure is defined as force per unit area. Similarly to the example in the text of the elephant and the figure skater, the more wheels or axles on the vehicle, the more area the weight is spread over, causing less pressure to be exerted on any one point on the bridge.
1. The relationship between pressure and temperature is: . 2. The formula for converting oC to K is: . 3. A gas with a pressure of 5.4 atm and at 25oC is raised to a new temperature of 78oC. What is the new pressure? 4. A gas with a pressure of 7.5 atm and at 30oC is raised to a new temperature of 150oC. What is the new pressure? 5.
Gay-Lussac’s law states that the pressure of a gas is directly proportional to the absolute temperature provided the volume and amount of gas are not changed.
The scale is calibrated to read the temperature as a function of the volume of the liquid. There are also thermometers which use the thermal expansion of a gas, which results in increasing the pressure of the gas if the volume of the gas is fixed. The pressure then tells you the temperature.
THERMODYNAMICS PRACTICE PROBLEMS. A Carnot refrigerator has a coefficient of performance of 10. If the refrigerator’s interior is to be kept at –45°C, the temperature of the refrigerator’s high temperature reservoir is most nearly. 250K.
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