greatly denser slightly denser
about the same dense
7）hardness hard soft ductile malleable
8）toxicity
toxic poisonous
9）melting
point boiling point
High
low
4）solubility
soluble
insoluble
slightly soluble
very soluble
5）observations
brisk effervescence
precipitate
aqueous solution
milky
6）density heavy light
less dense denser
3、 读 法
高温，高压
• 3.1 Nitrogen reacts with hydrogen to form ammonia at high temperature and pressure with the presence of a catalyst.
• 1 mol nitrogen reacts with 3 mol hydrogen to form 2 mol ammonia at high temperature and pressure with the presence of a catalyst.
《专业英语》教案 Teaching Plan on Specialized English Course for Applied Chemistry
课程类型：化学系专业选修课
Lesson Type: Specialized Course for Applied Chemistry
Teaching Plan on Specialized English Course for Applied Chemistry
2
•
Zinc treated with hydrochloric acid forms hydrogen and zinc chloride
3.4
Calcium carbonate when heated produces calcium oxide and carbon dioxide • Calcium carbonate is heated to yield calcium oxide and carbon dioxide • Calcium carbonate decomposes to calcium oxide and carbon dioxide when it is heated
Part7 A brief introduction to scientific writing in English
Part 1 Physical Properties
物 理 性 质 1）Colour 〖颜色〗
colourless
red-brown
violet-black
purple-black
3.2
• Nitrogen combines with hydrogen to form ammonia at high temperature and pressure with the presence of a catalyst.
பைடு நூலகம்
•
Ammonia decomposes to nitrogen and hydrogen at high temperature and pressure with the presence of a catalyst.
2、反应条件
• • • • • • heat ; burn ignite/ignition (点燃） electrolyze/electrolysis（电解） under/at ambient/room temperature under standard pressure with/in the prescence of catalyst
Part 1 Physical Properties
Part 2 Chemical Equations
Part 3 Chemical Calculation
Part 4 Nomenclature Of Inorganic Chemicals Part 5 Some Basic Chemical Theories Part6 Translation
10）conductivity
electronic conductivity
thermal conductivity
conductor semiconductor
insulator
Part 2 Chemical Equations
1.反应名称： 化 学 方 程 式
• Disproportionation（歧化反应） • neutralization; hydrolysis（中和反应， 水解反应） • exothermic reaction（放热反应） • endothermic reaction（吸热反应） • reversible reaction（可逆反应） • forward reaction（正向反应） • reverse reaction（逆反应） • spontaneous reaction（自发的反应） • nonspontaneous reaction （非自发反应）
pale yellow dark brown
2）state
solid
liquid
gas
gaseous
crystalline molten
oily
uncrystalline fused
3）smell
odourless
pungent
penetrating
choking
offensive
sour sweet bitter
3.3
• Reaction between nitrogen and hydrogen at high temperature and pressure with the presence of a catalyst gives ammonia.
• At high temperature and pressure, reaction of nitrogen with hydrogen in the presence of a catalyst takes place.