lecture 6 - Lecture 6 IT'S JUST A PHASE: Real Gases Kinetic...

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Lecture 6 IT’S JUST A PHASE : Real Gases Key Idea: Condensation of gases is associated with attractions between molecules . Kinetic Energy of Molecules 641 8.0 707 32 O 2 641 8.0 1000 16 CH 4 321 4.0 354 64 SO 2 321 4.0 500 32 O 2 321 4.0 707 16 CH 4 641 8.0 500 64 SO 2 T (K) KE (kJ/mole) v (m/s) m (g/mole) Kinetic energy depends on temperature KE = 1 2 m v 2 ~ 1000 miles/h At a given temperature , molecules exhibit a distribution of speeds. The lighter molecules move faster than the heavier ones. T = const. Kinetic Energy of Molecules KE = 1 2 m v 2 Question How much greater is the average speed of H 2 compared with O 2 ? A. 2 x faster B. 4 x faster C. 8 x faster D. 16 x faster Box 2 1.0 moles O 2 22.4 L, 273 K 32.0 g Box 1 1.0 mole H 2 22.4 L, 273 K 2.0 g Question How does the average kinetic energy of H 2 compare with O 2 ? A. KE(H 2 ) = KE(O 2 ) B. KE(H 2 ) > KE(O 2 ) C. KE(H 2 ) < KE(O 2 ) Box 2 1.0 moles O 2 22.4 L, 273 K 32.0 g Box 1 1.0 mole H 2 22.4 L, 273 K 2.0 g Avogadro’s Hypothesis
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This note was uploaded on 04/03/2008 for the course CHEM 1A taught by Professor Nitsche during the Fall '08 term at Berkeley.

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lecture 6 - Lecture 6 IT'S JUST A PHASE: Real Gases Kinetic...

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