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18:17 ส. 4 ธ.ค. แlจ 31% 0 ๐. 01:01 < T 0 8 ? + : ] 2. ถ้าต้องการกลั่นของเหลวที่ประกอบด้วย Ethanol 60 โมลเปอร์เซ็นต์ และ Isopropanol 40 โมลเปอร์เซ็นต์ เพื่อที่จะแยกให้ได้ Ethanol 95 โมลเปอร์เซ็นต์ที่ยอดหอกลั่น และ Isopropanol 90 โมลเปอร์เซ็นต์ที่ก้นหอกลั่น ถ้าสารละลายที่ป้อนเข้าหอกลั่นเป็นของผสมระหว่างของเหลวและไอ จงหาจำนวนชั้นตามทฤษฎีของการกลั่นนี้ (ให้ q = 0.8 และ Reflux = 1.5 Rm) (30 คะแนน) โดยที่ Ethanol มีน้ำหนักโมเลกุล เท่ากับ 46.07 และ จุดเดือดที่ 78.4 องศาเซลเซียส Isopropanol มีน้ำหนักโมเลกุล เท่ากับ 60.10 และ จุดเดือดที่ 82.3 องศาเซลเซียส 1.0 0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0.0 0.0 1.0+ 0.91 F 0.1 0.8ฯ -0.2 0.7- -0.3 0.6 - F0.4 0.51 -0.5 5 0.4า F0.6 0.33 -0.7 0.24 -0.8 0.13 F0.9 0.0+ - 1,0 0.0 0.1 0.2 0.3 0.4 0.5 0.5 0.7 0.8 0.9 1.0 X1 = Mole fraction of Ethanol in liquid phase 11 Y1 = Mole fraction of Ethanol in vapor phase > < ๑ \E

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4 Write statements in the present perfect with for or since. 1. | not done snapchat / last July. 6 Complete Pim's list for her online news show. Use the present perfect or past simple. - Ton hurt his arm this morning. He has ..havent.4one.anapahat.since.lสst.July. 2. People / know / about the Amazon River / (1) meve hurt.า (nอver / hurt) his arm กmany years. betore. (2) John (eat) insects yesterday. He's never eaten insects before, 3. We / not See / our COนsins / 2012. | had a Taekwondo lesson last Tuesday. | (3) (never / do) 4. Americans /watch/ movies/ Taekwondo before. OVer a hundred years Saly (4) (tidy) her bedroom this Wednesday. She didท't tidy her bedroom all year! 5. 1/ not blog / monthร My mother (5) (send) an email yesterday. She haรn't sent 6. Email/ be / around/ the 1990s. one before. Saly's dad went to a movie on Friday. He (6) (never / be) to Vocabulary E) a movie. 5 Write the past participles of these verl Writing See write 7 Write afew sentences about your life. fall make buy hurt find eat Win Send learn have break 04 Present perfect vs. Past simple 11 จาก 11 When we use past simple we Say a tinme in the past whereas we use present perfect to รay an action happened at นทspecied time before now. Unit 4 The Worid of Mwctia |37

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Present Perfect with just, 3.2 already, (not) yet and Past Simple We use the Present Perfect to talk about actions which happened and finished in the past, but we do not know when exacly or it is not important: T have read many biographies and autobiographies. (It's not important when I did it.) Common time expressions used with the Present Perfect: ever - used in questions: Have you ever been to an art galery? * never - used in negative sentences: My grandparents have never left England. 6 since then: She won The X Factor in 2006. Since then she has sold millions of albums. already and just - used mainly in affirmative sentences: Thave already seen this film. They have just left. * yet - used in negative sentences and questions and always at the end of the sentence: Thaven't seen her yet. Has she written any songs yet? If we want to say when something happened, we use the Past Simple. We also use the Past Simple in questions with when. She won a Grammy in 2009. When did yoน see Blur play live? Complete the sentences with the Present Perfect or Past Simple form of the verbs in brackets. (you/ever/be) to the opera? (go) last month. | 1 A: B: Yes. | (see) Madama Butterfly by Puccini. (write) many crime stories. (write) her latest crime story in 2014. 2 Claire Richards She (ust/upload) some videos. (release) his new 3 Look, Pierre 4 My favourite singer single last week, but | 5 Emily (not hear) it yet. (already/buy) a birthday present for her mum. (you/do) your homework yet? (finish) an hour ago. 6 Aะ B: Yes, I

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What moabos people Successน bte s Who do you think is the most successful? Who do you think is the least Successful? In order to answer these questions, we first need to define success. Everyone has a different definition. Many of us place great value on performance, on achievements, or on Others goals. SUCSS reaching various associate success with material goods, measuring it by how much one can acquire. Others measure success by how much they can contribute to the well-being of their families, or to the community and society in general There are many other definitions, but mostly success is associated with becoming rich, famous, and respected at work. Yet, it doesnt have to be that way. Being successful could mean simply being satisfied with oneself and one's career. For many people, a successful person is someone who feels that his or her work and life in general offer an exceptionally high degree of satisfactions. But how does one get from here to there? How does one reach this feeling of satisfaction with life and career? It seems that successful people consistently do two things: * They use their natural abilities in their work. * They set career and life goals. In other words, successfuนl people choose careers where they can use their natural abilities, or do what comes naturally to them. For example, successful teachers are people who instinctively know how to help people learn, and the best doctors are those who know how to listen to people. Successful people know where they are starting from, and what direction they want to give their lives and careers, even if it is something as simple and wonderful as raising a happy family. What are your natural abilities? What are your career and life goals? If you can answer these questions, you are on your way to having a Successful career and life.

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