Pressure Lab Essay Samples

Pressure Lab

....9756 17.6 15.0 1.168 17.5 13.0 1.345 17.5 10.0 1.711 17.1 7.00 2.294 16.1 Analysis: 1. 2. a. If the volume is doubled from 5.0 mL to 10.0 mL, the pressure valve decreases by one half. At 5.0 mL, the pressure is ~3.2 ATM and at 10.0 mL, the pressure is ~1.7 ATM (1.7 ATM/3.2 ATM = ~0.5). b. If the volume is halved from 20.0 mL to 10.0 mL, the pressure valve doubles. At 20.0 mL, the pressure is ~0.90 ATM and at 10.0 mL, the pressure is ~1.7 ATM (1.7 ATM/0.90 ATM = ~2.0). c. If the volume is tripled from 5.0 mL to 15.0 mL, the pressure valve decreases by a third. At 5.0 mL, the pressure is ~3.2 ATM and at 15.0 mL, the pressure is ~1.1 ATM (1.1 ATM/3.2 ATM = ~0.33). 3. Since P  1/V, to calculate the constant (K) for the volume/pressure relationship, you use the formula P = K  (1/V) or K = P V. K1 = V1P1 = (20.0mL) x (0.8830 ATM) = 17.7 ATM mL K2 = V2P2 = (18.0mL) x (0.9756 ATM) = 17.6 ATM mL K3 = V3P3 = (15.0mL) x (1.168 ATM) = 17.5 ATM mL K4 = V4P4 = (13.0mL) x (1.345 ATM) = 17.5 ATM mL K5 = V5P5 = (10.0mL) x (1.711ATM) = 17.1 ATM mL K6 = V6P6 = (7.00mL) x (2.294ATM) = 16.1 ATM mL Kaverage =  measured ‘K’ values # of measured values = (17.7 ATMmL) + (17. 6 ATMmL) + (17.5 ATMmL) + (17.5 ATMmL) + (17.1 ATMmL) + (16.1 ATMmL) 6 = 17.2 ATMmL. 4. The mathematical relationship between the pressure and volume of gases is called an inverse relationship. 5. Excluding the last data value (6.1 ATMmL at 7 mL), the ‘K’ values were pretty constant. The reason they may be different is because of experimenter mistakes. For example, when compressing the syringe to 20mL, there is no way we were 100% accurate, so it could have been 19.8mL or even 20.2 mL, which accounts for the little diversities in the ‘K’ values. Also, another reason why the values may vary may be because as the pressure increases (when the volume in the syringe decreases) the gas in the syringe may push against the syringe, allowing the syringe to expand and thus, allowing there to be a greater volume of gas in the syringe than what is actually calculated. 7. Based on our data collected, the ‘K’ constant (pressure x volume) remained relatively constant throughout the mab so if doesn’t matter what the pressure or volume is at a certain point, and since the relationship is inverse: Ki ≈ Kf Pi Vi ≈ Pf Vf Bonus: Explain what...

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