Gases Properties of Gases Properties of Gases ... - SLIDEBLAST.COM


Gas Laws Used to Calculate Changes in Variables. Use for Stoichiometry Calculations for Gases Not at STP. #1 You will use the Ideal Gas Law PV = nRT.

Gases Properties of Gases

Properties of Gases Described by the Kinetic Molecular Theory

Variables Used to Describe the Properties of Gases

Information about Units *All gas law calculations require T be in Kelvins (K). To convert from oC to K: ToC + 273 = TK Try this problem: As gas sample is measure at 25oC, what is the T in Kelvin?

*You will work with Volume in liters (L ) *You will work with Pressure in atmospheres (atm) Understand the unit: 1 atm = 14.7psi

Gas Laws Used to Calculate Changes in Variables Use for Stoichiometry Calculations for Gases Not at STP #1 You will use the Ideal Gas Law

PV = nRT

R is the Ideal Gas Law Constant R has the value of 0.0821 and the derived unit of L*atm/moles*K To use this value for R, YOU must be sure to have unit agreement, where P is in atm, V is in L, n is in moles and T is in Kelvin. Ideal Gas Law Video: https://youtu.be/TqLlfHBFY08

Example Problem

PV = nRT use algebra n = PV RT n = (1.95 atm) x (0.125L)______ ( 0.0821 L*atm/mole*K) X (318K) n = .0093 moles of CO2 Using the Ideal Gas Law in Stoichiometry Video: https://youtu.be/fzeW_ZUENhs?t=117

Ideal Gas Law and Stoichiometry Problems to Solve 1) A solution of ammonium sulfate, an important fertilizer, can be prepared by the synthesis reaction of gaseous ammonia and aqueous sulfuric acid. Calculate the volume of NH3 (in liters) needed at 20oC and 25.0 atm to react with 150,000 grams of H2SO4.

2) How many grams of aluminum chloride must decompose to produce 3.10 L of chlorine gas at 50.0oC and .971 atm?

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