6.1.1 If the reaction produces heat (increases the temperature of the surroundings) then it’s exothermic. If it decreases the temp (i.e. absorbs heat) then it’s endothermic. Also‚ the yield of an equilibrium reaction which is exothermic will be increased if it occurs at low temps‚ and so for endothermic reactions at high temperatures. 6.1.2 Exothermic : A reaction which produces heat. Endothermic : A reaction which absorbs heat. Enthalpy of reaction : The change in internal energy (H) through
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IB Chemistry Summary- By Paul Li & Silvia Riggioni TABLE OF CONTENTS Table of Contents............................................................................................................................................................ 1 Atomic Theory................................................................................................................................................................ 3 The Electromagnetic Spectrum.............................................
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HigHer level PaPer 1 Tuesday 2 November 2010 (afternoon) 1 hour INSTRUCTIONS TO CANDIDATES • Do not open this examination paper until instructed to do so. • Answer all the questions. • For each question‚ choose the answer you consider to be the best and indicate your choice on the answer sheet provided. 8810-6001 17 pages © International Baccalaureate Organization 2010 – 2 – 1. N10/4/BIOLO/HPM/ENG/TZ0/XX [Question and image removed for copyright reasons] 2. What is
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Determining the equilibrium constant from pH values of changing concentrations of ethanoic acid Design Research question: How will altering the concentrations of ethanoic acid affect the pH value‚ and‚ in-turn‚ the equilibrium constant? Background information: When weak acids react‚ the reaction typically does not go to completion. Rather‚ the system goes to an intermediate state in which the rates of the forward and reverse reactions are equal. Such a system is said to be in chemical equilibrium
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neural pathways (Visual‚ Auditory and Sensual) Trial# | Visual | Auditory(Sound) | Sensual(Pressure) | | (cm±0.1cm) | (cm±0.1cm) | (cm±0.1cm) | | John | Arthur | John | Arthur | John | Arthur | 1 | 43.9 | 24.1 | 33.1 | 34.6 | 50.1 | 50.5 | 2 | 73.7 | 45.6 | 66.1 | 49.2 | 29.2 | 75.2 | 3 | 47.4 | 31 | 80.2 | 25.3 | 54.4 | 41 | 4 | 32 | 24.7 | 23.1 | 39.6 | 25.6 | 47.4 | 5 | 23.5 | 29.1 | 32.9 | 35.1 | 26.2 | 30.8 | 6 | 38.6 | 27.6 | 47.6 | 34.7 | 40.6 | 49.5 | 7 | 37.9 | 20.9 |
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In dramatic construction there must be variation of pace and rhythm‚ monotony of any kind being certain to induce boredom. Comparing at least two plays you have studied in the light of this statement‚ show how variations of pace and rhythm have been used to attract of heighten the interest of the audience. Within Tennessee Williams A Streetcar Named Desire and Arthur Miller s The Crucible variations of pace and rhythm are utilized in order to attract or heighten the attention of the audience. However
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M10/5/MATHL/HP2/ENG/TZ1/XX/M+ MARKSCHEME May 2010 MATHEMATICS Higher Level Paper 2 Samples to team leaders Everything (marks‚ scripts etc) to IB Cardiff 13 pages June 8 2010 June 15 2010 –2– M10/5/MATHL/HP2/ENG/TZ1/XX/M+ This markscheme is confidential and for the exclusive use of examiners in this examination session. It is the property of the International Baccalaureate and must not be reproduced or distributed to any other person without the authorization of IB Cardiff. –3– M10/5/MATHL/HP2/ENG/TZ1/XX/M+
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mathematics higher level PaPer 2 Thursday 6 May 2010 (morning) 2 hours iNsTrucTioNs To cANdidATEs Write your session number in the boxes above. not open this examination paper until instructed to do so. do graphic display calculator is required for this paper. A section A: answer all of section A in the spaces provided. section B: answer all of section B on the answer sheets provided. Write your session number on each answer sheet‚ and attach them to this examination paper and your cover sheet
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acid which is 10 times greater than that of the bromine we can assume that the concentration of methanoic acid is constant throughout the experiment. method 1) Set up the colorimeter according to the instructions. Select a blue or green filter. 2) While you are waiting‚ prepare a results table with TIME in seconds and ABSORBANCE (in relative units). You are going to read the absorbance after 15‚ 30‚ 45 seconds‚ etc. until you have about 9 or 10 readings. 3) Fill a sample tube with distilled
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Genes and Genetics 1. 2. each chromosome exists as two genetically identical chromatids attached to their centromere. Each chromosome appears as two chromatids attached to a centromere. In the first meiotic division chromosomes align in homologous pairs. Points of contact form between members of the same homologous pair. The points of contact or crossing over between members of a homologous pair are the chiasmata. 3. The homologous pairs move to the equator of the cell. Equal lengths of the
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