专业英语-物理化学

1、精选优质文档-倾情为你奉上精选优质文档-倾情为你奉上专心-专注-专业专心-专注-专业精选优质文档-倾情为你奉上专心-专注-专业物化词汇部分：Chemical thermodynamics 化学热力学Chemical kinetics 化学动力学物理化学的分支：quantum chemistry 量子化学；structure chemistry 结构化学；catalysis 催化；electrochemistry 电化学；colloid chemistry 胶体化学。热力学体系：closed system 封闭体系：a system that does not allow transfer of

2、 substance but energyisolated system 孤立体系：a system that does not allow transfer of substance and energyopen system 开放体系：a system that allow transfer of substance and energyInternal energy 内能：motions 分子运动；interaction 相互作用；bonding of its constituent molecules 分子成键（ionic bond离子键, covalent bond共价键, coor

3、dinationbond配位键, hydrogen bond氢键, metallic bond.金属键）external energy 外能： （velocity速度；location of its center of mass位置）= kinetic 动力+potential energy 势能Thermal energy (internal energy + heat)Mechanical energy (external energy + mechanical /electrical work)Heat: energy transfer as a results of only temp

4、erature differenceWork: energy transfer by any mechanism that involves mechanical motion across thesystem boundaries.Microscopic properties:molecule kinetic energy 分子动能 (translational energy跃迁能, rotational energy转动能, vibrational energy振动能)Intermolecular forces 分子间力(electrostatic forces静电力, induction

5、 forces感应能, forces of attraction (or dispersion forces)分散能 and repulsion排斥能, specific (chemical) forces like hydrogen bonds)Intermolecular potentials 分子势 (Lennard-Jones potential) Macroscopic properties:pressure, volume, temperatureextensive variables广度性质 (volume, mass)intensive variables 强度性质(T, P,

6、 molar volume, molar mass)Thermodynamic Equilibriums热力学平衡:thermal equilibrium,热平衡force equilibrium,力平衡phase equilibrium,相平衡chemical equilibrium化学平衡PVT relationscompressibility factor 压缩因子expansion coefficient 体积膨胀系数compressibility coefficient 等温压缩系数热力学定律The first law of thermodynamics*Energyis neith

7、ercreatednordestroyed,but may change in formsenthalpy焓 heat capacity热容 isochoric等容 isobaric等压 reversible可逆, irreversible 不可逆isothermal等温, adiabatic绝热(diabatic), cyclic循环, free expansion自由膨胀 throttling 节流(isenthalpy等焓, Joule-Thomson coefficient) The second law of thermodynamicsClausius statement: It

8、is not possible to construct adevice that operates in a cycle and whose sole effect is to transfer heat from a colder body to a hotter body.The efficiency of the Carnot heat engine is defined to be:(QH-QC)/QH=W/QH=1-TC/THendothermic吸热 exothermic放热 entropy熵, isentropic process 等熵过程spontaneous system自

9、发系统, entropy balance熵平衡热化学：Heat of reaction反应热, isothermal、isobaric、only volumetric work，the reactionheat changeheat of combustion燃烧热, 25，100kPa the heat change of 1 mol pure substance fully combustionheat of formation生成热 fixed temperature and pressure，the heat change of 1 mol pure substance produce

10、d by the most stable elementGibbs free energy: G=H-TSHelmholtz free energy: F=U-TS相平衡：vapor pressure蒸汽压theexerted by ainwith its(solid or liquid) at a given temperature in a.boiling point沸点the temperature at which theof theequals thesurrounding the liquidand the liquid changes into a vapor.melting p

11、oint熔点the temperature at which it changesfromtoat atmospheric pressuresolidifying point凝固点the temperature at which it changesfromto soild at atmospheric pressurePartial molar quantity偏摩尔量Apartial molar propertyis aquantity which indicates how anof aorvaries with changes in thecomposition of the mixt

12、ure at constantand.Chemical potential化学势, is a form ofthat can be absorbed or released during a chemical reaction or.activity活度activity(symbola) is a measure of the “effective concentration” of ain a mixture, in the sense that the speciesdepends on the activity of a real solution in the same way tha

13、t it would depend on concentration for an.fugacity逸度, thefugacityof ais an effective partialwhich replaces the mechanical partial pressure in an accurate computation of the chemical equilibrium constant.activity coefficient活度系数, fugacity coefficient逸度系数the degree of freedom自由度 f=C-+2the number ofdeg

14、rees of freedomis the number of values in the final calculation of athat are free to varyPhase diagram相图: single-phase/binary/ternary x-y diagram, p-x-y diagram, t-x-y diagram fully /partly miscible solution可混溶的溶液,immiscible solution不可混容的溶液minimum/maximum azeotrope共沸（正偏差，最低共沸点；负偏差，最高共沸点）,dew point露点

15、the temperature at which airborne water vapor willto form liquid., bubble point泡点, the(at a given) where the first bubble ofis formed when heating aconsisting of two or more components.eutectic point共熔点the point at which thephase L borders directly on the solid phase + (a homogeneous composed of bot

16、h A and B), representing the minimum melting temperature of any possible alloy of A and B.multi-component system多组成体系化学平衡：Chemical equilibrium in a single-phase system:free energy of formation 组成自由能equilibrium constant 平衡常数endothermic reaction 放热反应exothermic reaction 吸热反应ionization constant 电离常数diss

17、ociation constant 解离常数association constant 结合常数化学动力学chemical reaction kinetics:rate of reaction反应速率, order of reaction反应要求activation energy活化能, activated molecules活化分子 activation活化collision碰撞, active centers活性中心 activation enthalpy活化焓parallel reaction平行反应：substance reacts or decomposes in more than

18、one wayseries reaction串联反应, two or more reaction in same environment without new operationchain reaction链式反应：Achain reactionis a sequence of reactions where a reactive product or by-product causes additional reactions to take placelight-chemical reaction,reaction mechanism 反应机理adsorption and catalysis (catalyst)其他Surface表面/interface界面colloid chemistry surface tension表面张力, interfacial tension界面张力,surface excess表面超额, surface film,表面膜surface coverage表面覆盖, adsorption on the surface,表面吸附surfactant/surface active agent表面活性剂，colloid (particles 5 5,000 angstroms)Electrochemistry, el