CHEM 1415 1st EditionLecture 3Unit: Ideal Gas LawOutline of Current Lecture I. Proportion of GasesII. Example 1: using Ideal Gas LawIII. Example 2: using Ideal Gas LawCurrent Lecture- Proportion of Gaseso Expands to fill the volume of any containero Gases have much lower densities than solids or liquidso Have highly variable densities, depending on the conditionso Mix with one another readily and thoroughly o Change volume dramatically with changing temperature - Ideal Gas LawPV =nRTR=0.08211 atmmol∗K- Example 1: Using Ideal Gas Lawo A cylinder of gas with V = 49.0 L and P = 154 atm. Cylinder is opened and gas is allowed to expand to P = 1 atm. What will the new volume be after expansion?P1V1=nRTP2V2=nRTP1V1=nRT=P2V2P1V1=P2V2(154 atm) (49.0 L)=(1 atm)V2V2=7546 LThese notes represent a detailed interpretation of the professor’s lecture. GradeBuddy is best used as a supplement to your own notes, not as a substitute.- Example 2: Using Ideal Gas Lawo How many grams are there of C H4at P = 154 atm, V = 49 L, T = 25 ℃ = 298 K?C 1 * 12 12H 4 * 1 4= 16 g/moln=PVRT=(154 atm)(49 L)(.0821atmmol∗K)(298 K )=308 molnumber of grams=308 mol∗16gmol=4935
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