# hw13b - HW#13a Note numbers used in solution steps are...

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HW#13a Note: numbers used in solution steps are different from your WebAssign values. Page 1 of 8 Note: numbers used in solution steps are different from your WebAssign values. 1. Walker3 17.P.003. [565748] Show Details In the morning, when the temperature is 286 K, a bicyclist finds that the absolute pressure in his tires is 501 kPa. That afternoon he finds that the pressure in the tire has increased to 554 kPa. Ignoring expansion of the tires, find the afternoon temperature. 316K When total amount and volume is not changed, Pressure is proportional to Temperature. p/T=constant. 2. Walker3 17.P.008. [565980] Show Details A balloon contains 3.7 liters of nitrogen gas at a temperature of 87 K and a pressure of 101 kPa. If the temperature of the gas is allowed to increase to 24 °C and the pressure remains constant, what volume will the gas occupy? 13L When total amount and pressure is not changed, Volume is proportional to Temperature. V/T=constant. 3. Walker3 16.P.007. [565730] Show Details The gas in a constant-volume gas thermometer has a pressure of 91.5 kPa at 101 °C. (a) What is the pressure of the gas at 50.0°C? kPa (b) At what temperature does the gas have a pressure of 115 kPa? °C

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HW#13a Note: numbers used in solution steps are different from your WebAssign values. Page 2 of 8 When total amount and volume is not changed, Pressure is proportional to Temperature. p/T=constant. p 1 /T 1 = p 2 /T 2 , so also (p 1 - p 2 ) / (T 1 -T 2 ) = p 1 /T 1 = p 2 /T 2 , this is the rate at which pressure increases as a function of temperature. 4. Walker3 16.P.011. [565718] Show Details When the bulb of a constant-volume gas thermometer is placed in a beaker of boiling water at 100°C, the pressure of the gas is 227 mmHg. When the bulb is moved to an ice-salt mixture the pressure of the gas drops to 162 mmHg. Assuming ideal behavior, as in the figure below, what is the Celsius temperature of the ice-salt mixture? °C
HW#13a Note: numbers used in solution steps are different from your WebAssign values. Page 3 of 8 5. Walker3 17.P.013. [565750] Show Details The air inside a hot air balloon has an average temperature of 77.2 °C. The outside air has a temperature of 20.3°C. What is the ratio of the density of air in the balloon to the density of air in the surrounding atmosphere? inside / outside = Please notice that at balanced condition, pressure is equal inside and out of the hot air balloon. Otherwise, if pressure outside is higher, the balloon will shrink and air will keep flowing in through the opening forever. If pressure inside is higher, air will keep flowing out through the opening forever. As a result, at balanced

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hw13b - HW#13a Note numbers used in solution steps are...

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