All Chapters
Ch.1 - Intro to General Chemistry
Ch.2 - Atoms & Elements
Ch.3 - Chemical Reactions
BONUS: Lab Techniques and Procedures
BONUS: Mathematical Operations and Functions
Ch.4 - Chemical Quantities & Aqueous Reactions
Ch.5 - Gases
Ch.6 - Thermochemistry
Ch.7 - Quantum Mechanics
Ch.8 - Periodic Properties of the Elements
Ch.9 - Bonding & Molecular Structure
Ch.10 - Molecular Shapes & Valence Bond Theory
Ch.11 - Liquids, Solids & Intermolecular Forces
Ch.12 - Solutions
Ch.13 - Chemical Kinetics
Ch.14 - Chemical Equilibrium
Ch.15 - Acid and Base Equilibrium
Ch.16 - Aqueous Equilibrium
Ch. 17 - Chemical Thermodynamics
Ch.18 - Electrochemistry
Ch.19 - Nuclear Chemistry
Ch.20 - Organic Chemistry
Ch.22 - Chemistry of the Nonmetals
Ch.23 - Transition Metals and Coordination Compounds

Solution: Calculate the root mean square velocity of F2,Cl2, and Br2 at 302 K .

Solution: Calculate the root mean square velocity of F2,Cl2, and Br2 at 302 K .

Problem

Calculate the root mean square velocity of F2,Cl2, and Br2 at 302 K .

Solution
  • Root mean squared or RMS can be calculated using the provided temperature and the molar mass of the gas where:

  • We need the molar mass in kg/mol instead of g/mol because we have a unit J which can be simplified as kg2•m2•s-2
  • Molar mass of F2, Cl2 and Brin kg/mol will appear as:

1 g = 1x10-3 kg/mol

MM of F2 : 19.0 (2) = 38 g/mol or 38x10-3 kg/mol

MM of Cl2 : 35.45 (2) = 70.90 g/mol or 70.90x10-3 kg/mol

MM of Br2 : 79.90 (2) = 159.8 g/mol or 159.8x10-3 kg/mol

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