Questions and Answers
What is the volume of the gas at a pressure of 1.0 atm and a temperature of 294K?
925 L
What is the initial pressure of the gas in atm?
18.5 atm
What is the temperature of the gas in Kelvin?
294 K
What is the equation used to calculate the volume of the gas?
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What is the final pressure of the gas in atm?
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What is the total pressure of the gas mixture, Ptotal, in the given equation?
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What is the purpose of a barometer in atmospheric pressure measurement?
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What is the characteristic of the gas mixture represented by the equation, considering the values of ni and nt?
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What happens to the pressure of a gas when it is compressed?
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What is the value of Pi in the given equation, considering the value of ni as 0.78?
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What is the equivalent of 1 atmosphere in American Engineering Units?
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What is the primary function of a barometer?
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What is the pressure exerted on the top of your head, assuming a surface area of 0.25×0.20 m2?
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What is the unit of pressure that is equivalent to lb/in2?
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What is the atmospheric pressure equivalent to?
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Study Notes
Pressure and Atmosphere
- 1 atmosphere is equal to 14.7 psi (pounds per square inch)
- American Engineering Unit for pressure is psi, which is equivalent to lb/in2
Barometer
- Used to measure atmospheric pressure
Pressure Calculation
- Total pressure (Ptotal) can be calculated using the formula: Pi = (0.25 × 0.20 m2) × Ptotal
- Example calculation: Pi = (0.25 × 0.20 m2) × 760 torr = 590 torr
Ideal Gas Equation
- The equation is: P1V1 = P2V2
- Example problem:
- Initial conditions: P1 = 18.5 atm, V1 = 50.0 L, T1 = 294K
- Final conditions: P2 = 1.0 atm, T2 = 294K
- Solution: V2 = (50.0 L) × (18.5 atm) / (1.0 atm) = 925 L
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