GC_4253_L08_Gas_Laws.docx - Gas Laws PRE-LAB QUESTIONS 1 What is the conversion from Celsius to Kelvin and why is this conversion useful when applying

GC_4253_L08_Gas_Laws.docx - Gas Laws PRE-LAB QUESTIONS 1...

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PRE-LAB QUESTIONS 1. What is the conversion from Celsius to Kelvin and why is this conversion useful when applying gas law calculations? The conversion is adding 273 K to the temperature in Celsius. This is useful because Kelvin is a concept of zero heat energy that we use during ideal gas law equations 2. A room is heated from 15 °C to 30 °C. What are these temperatures in Kelvin? 15 degrees C +273K= 288K 30 degrees C +273K= 303K 3. Following question 2, what is the temperature change in Celsius? What is the temperature change in Kelvin? The change in Celsius is 15 degrees and the change in Kelvin is 15k. They are the same. 4. What is the barometric pressure in your region? If necessary, convert from mm Hg to atmospheres (atm). Divide the measured pressure by 760 mm Hg. This will give you pressure, (P), in atmospheres. The barometric pressure is 1 5. Convert a volume of 564.3 mL of oxygen from mL to liters (L). 564.3ml equals 0.5643 L Gas Laws
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6. Rearrange the ideal gas law (PV = nRT) to algebraically solve for n, using the values you calculated above at a temperature of 30 °C. P=1 atm, V= 0.5643L, R=0.821, T= 303K N=(1)(0.5643)/(0.0821)(303) N=0.0227 mol Gas Laws
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EXPERIMENT 1: IDEAL GAS LAW – FINDING PERCENT H 2 O 2 Data Sheet Table 1: Temperature, Pressure, and Volume Data Temperature of Distilled H 2 O: Room (or regional) Pressure (atm): Initial Volume of Air (mL) Final Volume of Air (after reaction) (mL) Volume of O 2 Collected (Final Volume - Initial Volume) 20c 1.0076 5ml 48 43 Table 2: Reaction Time Data Time Reaction Started Time Reaction Ended Total Reaction Time 20:32 20:32:54 0:54 Post-Lab Questions 1.
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  • Spring '15
  • Khurana

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