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第2章 物质的热力学性质及其估算方法
2.3 热力学第二定律,
函数及
2.1 热力学性质数据表
2.1.1 低压下(p→0理想气体)气体的热容
2.1.1.1 低压下有机化合物(理想气体)气体标准状态下摩尔定压热容
~T多项式系数
相关数据见表2-1。
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2.1.1.2 元素和无机物气体(低压,理想气体)标准状态下
~T关系式中各系数值
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表2-3 元素在298.15K,100kPa(1bar)下比定压热容、摩尔定压热容
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注:*摩尔定压热容Cp摘自《纯物质热化学数据手册》(程乃良等译,2003)。
2.1.2 凝聚态物质的热容
2.1.2.1 液体有机化合物的摩尔定压热容Cp~T 关联式中系数值
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2.1.2.2 某些固体有机物的比热容
有关数据见表2-5。
表2-5 某些有机物 (固体) 的比热容[2]
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注:m.p.熔点。
2.1.2.3 某些单质和无机化合物固、液态的Cp~T关系式中系数值
有关数据见表2-6,表2-7。
表2-6 某些单质和无机化合物固、 液态的摩尔定压热容与温度T的关系[2,3]
(Cp=a+b×10-3T+c×106T-2-d×10-6T2)
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注:s—固体;l—液体;括号内α,A,B,C,Ⅰ,Ⅱ等表示晶形结构的不同。
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2.1.2.4 某些选定的金属元素不同温度下(T=4~800K)比热容c
有关数据见表2-8。
表2-8 某些选定的金属元素不同温度下比热容c[42] 单位: kJ/(kg·K)
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参考文献[5]列有约1700种有机和无机物凝聚态的cp~f(T)关联式各参数数值,但由于通常状态下物质不可能气、液、固三态都存在,故实际上有数据的凝态物质的数目要少于此。对于工程技术人员来说此手册还是比较易于使用的。Yaws在此手册中给出液体:cp,l=A+BT+CT2+DT3,固体:cps=A+BT+CT2关联式。式中各物质的回归系数皆列入相应栏目,同时给出其温度上、下限。另有例题,对有代表性的物质cp计算结果与真实数据比较用图示出。
2.1.3 聚合物的比定压热容
表2-10~表2-73中各标明温度下的聚合物比定压热容cp数值,系文献[42]编者直接引用文献表格中的数据或由按实验数据绘出的大比例图中确定的,各表中数据平均误差不超过0.5%~1%。
2.1.3.1 聚合物的比定压热容温度关联式中系数值
有关数据见表2-9。
表2-9 cp=a+bT+cT2的参数值[35]
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2.1.3.2 碳链聚合物的比定压热容
表2-10 在结晶状态下的氘化聚乙烯
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表2-11 高密度聚乙烯
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注:( )括号内数据为熔融间断时的数据。
表2-12 低密度聚乙烯
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注:( )括号内数据为熔融间断时的数据。
表2-13 聚氟乙烯
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表2-14 聚氯乙烯
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表2-15 聚四氟乙烯
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表2-16 聚三氟乙烯
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表2-17 聚偏二氟乙烯
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*原书如此恐系15之误。
表2-18 聚偏二氯乙烯
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表2-19 聚苯乙烯
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表2-20 聚丙烯
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注:1.加*者为熔体的数据。
2.括号内数据为熔融间断时的数据。
表2-21 聚丙烯腈
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表2-22 全同立构聚1-丁烯(结晶度0.44)
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表2-23 1,4-聚丁二烯
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* 是晶体中螺环构象链的数据。
表2-24 聚异丁烯
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表2-25 聚1,4-甲基丁二烯(顺式)
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表2-26 聚4-甲基-1-戊烯(结晶度0.29)
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表2-27 聚戊烯橡胶
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表2-28 聚1-己烯
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表2-29 聚乙烯基三甲基硅烷
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表2-30 聚乙烯基苄基二甲硅烷
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表2-31 聚乙烯醇缩丁醛
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表2-32 聚甲基丙烯酸
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表2-33 聚丙烯酸甲酯
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表2-34 聚丙烯酸乙酯
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表2-35 聚甲基丙烯酸乙酯
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表2-36 聚丙烯酸丁酯
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表2-37 无规立构聚甲基丙烯酸甲酯
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表2-38 聚甲基丙烯酸丁酯
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表2-39 甲基丙烯酸甲酯和甲基丙烯酸的无规共聚物
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2.1.3.3 杂链聚合物的比定压热容
表2-40 α,ω-二氢化聚亚乙烯基二苯基锗([M]n=1.4×103)
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表2-41 α,ω-二氢化聚亚乙烯基二苯基硅([M]n=1.2×103)
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注:[M]n——数均相对分子质量。
表2-42 尼龙6(聚己内酰胺)
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表2-43 尼龙7(聚庚酰胺)
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表2-44 聚丙烯砜
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表2-45 聚1-丁烯砜
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表2-46 聚1-己烯砜
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表2-47 聚二甲基硅氧烷
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表2-48 聚二乙基硅氧烷
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表2-49 聚环氧乙烷
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注:括号内数字为熔融间断时的数据。
[M]n数均相对分子质量,[M]ν黏均相对分子质量。
表2-50 聚氧杂环丁烷
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注:( )括号内数字为熔融间断时的数据。
表2-51 聚1,3-二氧杂环庚烷(结晶度0.50)
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注:加*者为熔点。
表2-52 聚1,3-二戊烷(结晶度0.58)
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注:加*者为熔点。
表2-53 聚3,3-双(氯甲基)-氧杂环丁烷
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表2-54 三烷与2%环氧乙烷的无规共聚物
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表2-55 结晶状态下的β-聚丙内酯
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表2-56 结晶状态下的ε-聚己内酯
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表2-57 聚三癸内酯 (结晶度0.75)
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表2-58 聚氰酸酯[2,2-双(4-氰酸苯基)丙烷]的多环三聚产物
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表2-59 聚乙交酯 (结晶度0.67)
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注:加*者为熔点。
表2-60 单晶聚丁二炔(2,4-己二炔-1,6-二醇双对甲苯磺酸盐的固相聚合产物)
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表2-61 聚四氢呋喃
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表2-62 聚甲醛
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表2-63 聚亚辛基醚
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注:( )内是熔融间断时的数据。
2.1.3.4 主链上带有环状基团的聚合物的比定压热容
表2-64 吡酮类
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表2-65 聚氨基酰胺酸
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表2-66 聚二苯胺
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表2-67 聚氨基酰亚胺
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表2-68 聚苯并咪唑
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表2-69 聚对苯二甲酸乙二醇酯 (结晶度0.75)
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表2-70 聚对苯二甲酸丁二醇酯 (结晶度0.37)
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注:( )内数字为熔融间断时的数据。
表2-71 基于双酚A的聚碳酸酯
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表2-72 聚2,6-二甲基-1,4-亚苯基醚
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表2-73 酚醛树脂
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2.1.4 某些常见液体、固体材料及油类的比定压热容
具体内容见表2-74a~表2-74c。
表2-74a 某些常见材料的比定压热容
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注:*由文献[2]cp值乘以4.184换算而得,其它物质的cp选自文献[6]和文献[8]表21-71 cp数值乘以4.184而得。
表2-74b 常见油(动物,蔬菜,矿物油)[2]的比定压热容
式中
=密度, g/cm3
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注:选自文献[6]和文献[8]表21-71 cp数值乘以4.184而得。
表2-74c 不锈钢-310*热物理性质[9]
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注:DT热扩散系数;cp比定压热容;ρ密度;λ热导率;
*参考标准不锈钢310(reference standard stainless steel 310)。
2.1.5 某些有机、无机水溶液比定压热容(不同组成、不同温度下)
2.1.5.1 几种醇水溶液的比定压热容
具体内容见表2-75。
表2-75 甲醇,乙醇,丙醇,丙三醇(甘油)水溶液比定压热容
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注:cp数值皆系文献[42]中所列相应数值乘以4.184而得。
2.1.5.2 某些酸、碱、盐水溶液的比定压热容
具体内容见表2-76。
表2-76 某些酸、碱、盐水溶液比定压热容
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注:所列cp数值皆系文献[2]中相应数值乘以4.184而得到的。原文献数据如此,以数据顺序有误。
2.1.6 几种重要工业气体的热容及质量热容比[2,36]
具体内容见表2-77~表2-86。
2.1.6.1 空气
(1)空气的热容及质量热容比
表2-77 空气在不同温度下的热容及质量热容比
air(M=28.970)体积组成:N2 0.7803,O2 0.2099,Ar 0.0094,CO 0.0003,H2 0.0001
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注:M——摩尔质量kg/kmol,k=cp/cv——质量热容比(绝热指数)。
(2)不同压力、温度下空气质量热容比
表2-78 不同压力、温度下空气热容比cp/
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①表中数据系文献[2]编者由Sychev,V.V.,Vasserman A.A.et al“Thermodynamic Properties of Air”,Standartov.Moscow,1978,Hemisphere New York 1988 一书中cp、cv值计算得到。
②1bar=105Pa或0.1MPa。
2.1.6.2 氮气
表2-79 氮气在不同温度下的热容及质量热容比
nitrogen(M=28.016)N2
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2.1.6.3 大气氮
表2-80 大气氮在不同温度下的热容及质量热容比
atmospheric nitrogen(M=28.15)体积组成:N2 0.9876,CO 0.0004,Ar 0.0119,H2 0.0001
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注:除去氧的空气——大气N2。
2.1.6.4 氧气
表2-81 氧气在不同温度(t℃)下的热容及质量热容比
oxygen(M=31.9988)O2
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2.1.6.5 一氧化碳
表2-82 一氧化碳不同温度下的热容和质量热容比
carbon monoxide(M=28.011)CO
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2.1.6.6 二氧化碳
表2-83 二氧化碳气在不同温度下的热容及质量热容比
carbon dioxide(M=44.009)CO2
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2.1.6.7 氢气
表2-84 氢气在不同温度下的热容与质量热容比
hydrogen(M=2.01594)H2
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2.1.6.8 水蒸气
表2-85 水蒸气在不同温度下的热容及质量热容比
steam(M=18.016) H2O(蒸汽)
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2.1.7 某些有机、无机和单质气体在1.01325×105Pa下质量热容比
具体内容见表2-86。
表2-86 某些有机、无机物气体在1.01325×105Pa(1atm)下质量热容比cp/
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