Arrhenius equation for the decomposition of cyclobutane are In (A/s-1) = 15.6 and Ea = 261 kJ mol-1. Determine the half-life of cyclobutane at the temperature of 773 K. C4H8 (g) 2 C2H4 (g) The decomposition of cyclobutane follows first order kinetics as the unit of A is s-1. Comment: The units for A provide information on the reaction’s overall order of kinetics. Substitute the values of In A = 15.6 and Ea = 261 x 103 into the Arrhenius equation. k = 3.595 x 10-17 s-1 half-life = ln2/k
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9781439041130_UnitC_pp2.qxd 5/4/09 11:08 PM Page 49 UNIT C Verbal Communication Pr op er N ty ot o Fo f C r R en ep ga ro ge du L ct ea io rn n in Files You Will Need: C-1.doc C-2.doc C-3.doc C-4.doc C-5.doc C-6.doc C-7.doc C-8.doc C-9.doc Developing Professional Telephone Skills Since its development in 1876 by Alexander Graham Bell‚ the telephone has become one of the most common home and business appliances. The word “telephone” comes from the Greek “tele‚” meaning at
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IC 7805- The input voltage must always be higher than the output voltage by some minimum amount (typically 1.5 to 2 volts) . 7805 is a linear voltage regulator‚ so it is not very efficient and it has drop out voltage problem. As they are based on a linear regulator design‚ the input current required is always the same as the output current. As the input voltage must always be higher than the output voltage‚ this means that the total power (voltage multiplied by current) going into the 78xx will be
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The main theories in Second Language Acquisition (SLA) 1. Introduction The language produced by learners learning a second language is extremely varied. It can range from one learner to another in regard to many factors. These variations can be accounted for by a number of ideas including: first language (L1) interface‚ age differences‚ motivation‚ self-confidence‚ aptitude‚ anxiety‚ gender and social distance. In this essay I will define SLA and then outline five of the main linguistic theories
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Contract and Procurement Management Course Project Part 3 Name: Email: Course: PM 598 Instructor: Date: Proposal to Supply Treated Lumber and Poles National Guard Bureau‚ New Mexico Solicitation Number: W912J313T0012 Contract Award Date: 7/15/13 Submitted By: Xxx xxx Sales Manager American Pole and Timber Ph: 800-716-0636 Fax: 224-627-3333 Date: 06/12/2013 1. COVER LETTER June 12‚ 2013 LEANDRA GARCIA 47 BATAAN BLVD SANTA FE‚ NM‚ 87508-4695
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the clamor and he said to the gods in the council‚ ‘The uproar of mankind is intolerable and sleep is no longer possible by reason of the babel.’ So the gods agreed to exterminate mankind” (Andrea‚ 11). Later on‚ the story tells that one of the gods‚ Ea‚ told Utnapishtim about the agreement that the gods made‚ and ordered Utnapishtim to build a boat and to bring “the seed of all living creatures” (Andrea‚ 12). At the end of this particular story‚ Ishtar‚ one of the gods‚ took off her necklace and it
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Note: Course content may be changed‚ term to term‚ without notice. The information below is provided as a guide for course selection and is not binding in any form‚ and should not be used to purchase course materials. COURSE SYLLABUS ECNC 213 PRINCIPLES OF ECONOMICS I (MICRO) COURSE DESCRIPTION An introduction to the theory and history of free exchange and economic inquiry. Free market thought will be scrutinized from the perspective of the Christian understanding of human behavior
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during and over the Inchcape Rock. In fact‚ the which he became very rich by stealing from waves were so small that they did not move other ships‚ but eventually he decided to enough to ring the Inchcape Bell. return to Scotland. ea rn ing and no waves‚ a ship lay silently and still in 12. 3. As he came closer to shore‚ there was a rel The Abbot of Aberbrothok had placed the bell on a buoy on the Rock so that in stormy weather it would float and swing
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nonpolar organic solvents – para isomer is less soluble than ortho or meta in any given solvent can be readily purified by recrystallization Consider: REACTIONS: 1. Electrophilic aromatic substitution (EAS) – recall directing power (o‚ p director) but ring is deactivated toward EAS. 2. Nucleophilic Aromatic Substitution (NAS or SNAr) ipso substitution an atom or group other than H is replaced in the reaction Reaction Mechanisms For NAS: A. BIMOLECULAR DISPLACEMENT: addition-elimination
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Enzymes are responsible for multiple reactions that take place naturally in the living organisms. The purpose of the enzymes lab was to investigate how the enzymes play a role in a reaction‚ affecting the rate of reaction (ROR). Interestingly‚ we tested how the enzymes affect the reaction rate at multiple temperatures (0‚ 23‚ 37‚ 50‚ 70‚ and 95 C). It was predicted that an increase in temperature will elevate the thermal activity of substrate which increases the chances the substrate molecules will
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