大学物理(热学) 1) Review 2) Carnot's Ideas 3 The Second Law 4) Carnot's cycle 2006-12-13 2021/9/5
2021/9/5 1 大学物理（热学） 1) Review 2) Carnot’s Ideas 3) The Second Law 4) Carnot’s cycle 2006-12-13
(at 1 atm constant ressure s 20c unless otherwise stated) =MC△ SpeciflcⅡeaC kcal/kg ∈ca】/g E /g·C 重num 22 900 Acohol Ethyl) 0.58 2400 Copper 0.093 390 Glass .2O 84o ron or steel O11 45O ead O031 13o Marble O.21 86o Mercury O033 ⊥4o Siver o.056 230 Nood Wate IIce 之1OD 工 IdLc 15°c) 工.00 4186 Stea (10C) O.48 2010 Human body Average) O83 340 Protein 0.4
TABLE 19-3 Specific heats of gases at 15.C Q=nCyAT Specific heats Molar specific heats Q=nCDAT cl/kg·K) (cal/mol K Cp -C y P Gas C C V P (cal/mol K) Monatomic He 0.751.15 2.98497 1.67 e 0.1480.246 2.98497 167 Diatomic 0.1770.248 4966.95 19 1.40 0.1550218503703 2.00 140 Triatomic CO 0.1530.199 680883 2.03 1.30 H2O(100C03500482 6.208.20 2.00 1.32 Polyatomic CH 0.3430.41210.301235 2.05 1.20
Q=nCv⊿T Q=nCp⊿T
AR+Cy FIGURE 19-16 Molar specific heat 3R ydrogen molecules(H,) As the ional kinetic energy I.----ir the translational kinetic energy can 2R Rotational kinetic energy be transferred in collisions into 201500100ld
FIGURE 19-17 Molar heat capacities of solids as a function of temperature eat Beryllium Diamond 2 01002003004005006007008009001000 Temperature(K)