UNIVERSITI MALAYA UNIVERSITY OF MALAYA PEPERIKSAAN IJAZAH SARJANA MUDA SAINS EXAMINATION FOR THE DEGREE OF BACHELOR OF SCIENCE SESI AKADEMIK 2015/2016 : SEMESTER 1 ACADEMIC SESSION 2015/2016 : SEMESTER 1 SCES3140 : KIMIA INDUSTRI II INDUSTRIAL CHEMISTRY II Dis 2015/Jan 2016 Dec 2015/Jan 2016 Masa: 2 jam Time: 2 hours ARAHAN KEPADA CALON: INSTRUCTIONS TO CANDIDATES: Kertas soalan ini mengandungi Bahagian A dan B This paper consists of Section A and B Jawab soalan mengikut arahan yang diberikan dalam setiap bahagian. Questions should be answered according to the instructions given in each section. (Kertas ini mengandungi 6 soalan dalam 5 halaman yang dicetak) (This question paper consists of 6 questions on 5 printed pages)
Jawab Dua soalan Answer Two questions BAHAGIAN A (50 MARKAH) SECTION A (50 MARKS) 1. Huraikan semua proses bagi penghasilan biodiesel sawit dan minyak sawit merah. Describe all processes in the production of palm biodiesel and red palm oil. 2. Huraikan penghasilan asid lemak dan gliserol secara industri daripada minyak sawit mentah dan bincangkan kegunaannya. Describe the industrial production of fatty acid and glycerol from crude palm oil and discuss their applications. 3. Huraikan penghasilan berbagai minyak pelincir asli secara industri daripada minyak petrolium mentah. Describe the industrial production of various types of natural lubricants from crude petroleum oil. 2/5
BAHAGIAN B (50 MARKAH) SECTION B (50 MARKS) Jawab SEMUA soalan dalam bahagian ini. Answer ALL questions in this section. 4. Larutan akues sodium hidroksid mengandungi 20% NaOH dengan jisim. Ia diperlukan untuk menghasilkan larutan 8% NaOH dengan mencairkan aliran larutan 20% NaOH tersebut bersama aliran air tulen. An aqueous solution of sodium hydroxide contains 20% NaOH by mass. It is desired to produce an 8% NaOH solution by diluting a stream of the 20% solution with a stream of pure water. Kirakan nisbah bagi (g H 2 O/g larutan suapan) dan (g larutan hasil/g larutan suapan). Calculate the ratios (g H 2 O/g feed solution) and (g product solution/g feed solution). (6 markah/marks) (b) Tentukan kadar suapan bagi larutan 20% dan air pencairan yang diperlukan untuk menghasilkan 2310lb/min larutan 8%. Determine the feed rates of 20% solution and diluting water needed to produce 2310 lb/min of the 8% solution. 5. Nyatakan dan gambarkan beberapa jenis aliran mengikut hukum Newton. State and illustrate the various types of flow in relation to Newton s Law. Hitungkan nombor Reynolds (Re) bagi aliran minyak sawit kernel ke reaktor serta tentukan sama ada ia adalah aliran lamina atau aliran gelora bagi paip berdiameter 15 cm. Calculate the Reynolds number (Re) for the flow of palm kernel oil to the reactor and determine whether the flow is laminar or turbulent for 15 cm diameter pipe. (10 markah/marks) 3/5
Aliran/Flow = 0.001 m 3 s -1 Ketumpatan/Density = 1800 kgm -3 Kelikatan/Viscosity = 0.01 Nsm -2 6. Jelaskan tiga (3) mekanisme asas pemindahan haba. Explain the three (3) basic mechanisms of heat transfer. (6 markah/marks) Taburan suhu seluruh dinding dengan ketebalan 1 m pada masa tertentu diberikan sebagai: The temperature distribution across a wall 1 m thick at a certain instant of time is given as: T(x) = a + bx + cx 2 di mana T adalah dalam C dan x ialah dalam m, manakal a = 900 C, b = -300 C/m dan c = -50 C/m 2. Penjanaan haba seragam q = 1000 W / m 3 hadir di dinding yang luasnya 10 m 2 mempunyai sifat = 1600 kg/m 3, k = 40 W/m.K dan c p = 4 kj/ kg.k. where T is in C and x is in m, while a = 900 C, b = -300 C/m and c = -50 C/m 2. A uniform heat generation q = 1000 W/m 3 is present in the wall of area 10 m 2 having the properties = 1600 kg/m 3, k = 40 W/m.K and c p = 4 kj/kg.k. (i) Tentukan kadar pemindahan haba yang memasuki dinding (x = 0) dan keluar daripada dinding (x = 1 m). Determine the rate of heat transfer through the wall (x = 0) and leaving the wall (x = 1 m). (ii) Tentukan kadar pertukaran bagi penyimpan tenaga dalam dinding. Determine the rate of change of energy storage in the wall. 4/5
(iii) Tentukan kadar masa bagi pertukaran suhu pada x = 0.025 dan 0.5 m Determine the time rate of temperature change at x = 0. 0.25 and 0.5m (b) Huraikan dua (2) jenis penukar haba paip kembar. Describe the two (2) different types of double pipe heat exchangers. TAMAT END 5/5