'Output heat' presentation slideshows

Absolute Zero

Absolute Zero. Physics 313 Professor Lee Carkner Lecture 15. Exercise #14 Carnot Cycle. Isothermal heat = work W = (1.5)(8.31)(700)ln(2X10 -3 /4X10 -4 ) Net work depends of efficiency h = W/Q H = 0.6 Can get output heat from first law Q L = Q H - W = 14043-8426 = 5617 J.

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The Second Law of Thermodynamics

Physics 102 Professor Lee Carkner Lecture 7. The Second Law of Thermodynamics. PAL #6 First Law. 1 mole of gas at 300 K and 2 m 3 compressed to 1 m 3 , constant pressure P = nRT/V = (1)(8.31)(300)/(2) = 1246.5 Pa W = P D V = (P) (V f -V i ) Sign of work? Volume decreased. Engines.

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Engines

Engines. Second Law I. Real processes often make sense in only one direction in time. The second law of thermodynamics states this: Heat flows naturally from a hot object to a cold object; heat will not flow spontaneously from a cold object to a hot object. Heat Engine.

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