Investigating the solubility of Group II hydroxides Jiyeon Kim Aim: To investigate the solubility of Group II hydroxides (Mg(OH)2‚ Ca(OH)2‚ Sr(OH)2‚ Ba(OH)2) Research Question: What is the trend of solubility of Group II hydroxides going down the group as determined through measuring the volume of hydroxides needed to titrate with a known concentration of hydrochloric acid? Background Information: Solubility is when a solute forms a homogeneous solution by dissolving in solvent. The solubility
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sheet. 8810-6105 13 pages © International Baccalaureate Organization 2010 0113 –2– N10/4/CHEMI/SP2/ENG/TZ0/XX SECTION A Answer all the questions in the spaces provided. 1. The data below are from an experiment to measure the enthalpy change for the reaction of aqueous copper(II) sulfate‚ CuSO4 (aq) and zinc‚ Zn (s). Cu 2+(aq ) + Zn (s) → Cu (s) + Zn 2+(aq ) 50.0 cm3 of 1.00 mol dm–3 copper(II) sulfate solution was placed in a polystyrene cup and zinc powder was added after
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SYLLABUS – ADVANCED PLACEMENT CHEMISTRY Required Texts 1. Chemistry: The Central Science by Brown‚ LeMay and Bursten‚ 10th ed.‚ Pearson Education. Inc.‚ Upper Saddle River‚ NJ‚ 2006‚ ISBN: 0131464892 Includes: Text book‚ Laboratory Manual‚ Student Study Guide‚ AP Test Prep Series‚ Solutions to Practice Problems 2. Barrons AP Chemistry‚ Jespersen‚ Neil D‚ 4th ed.‚ Barron’s Educational Series‚ Inc‚ 250 Wireless Boulevard‚ Hauppauge‚ New York 11788
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2O2(g ) ¡ CO2(g ) ϩ 2H2O(l ) ⌬H ϭ Ϫ890 kJ Burning 1 mol of methane releases 890 kJ of heat. The heat of combustion (⌬H) for this reaction is Ϫ890 kJ per mole of carbon burned. Like other heats of reaction‚ heats of combustion are reported as the enthalpy changes when the reactions are carried out at 101.3 kPa of pressure and the reactants and products are in their physical states at 25°C. Figure 17.8 The combustion of natural gas is an exothermic reaction. As bonds in methane (the main component
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PHYS321 Thermodynamics and Statistical Physics Thermal Physics Deals with a collection of a large number of particles “More is different!” --- P.W. Anderson It is effectively impossible to follow the motion and trajectory of each particle two approaches in thermal physics • Thermodynamics (macroscopic) • Statistical mechanics (microscopic) “Four fundamental pillars of our physical theory: general relativity‚ quantum mechanics‚ the theory of elementary particles and statistical mechanics… No
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The Increasing Enthalpy of Combustion Rates for Pentanol Isomers EEI Report Draft - JEREMY SAJU 11B Fuels are the main energy source of the modern world. The topic of this extended experimental investigation is to explore combustion rates of alcohols‚ specifically pentanol and it’s relationship with varying structural isomers. A fuel is defined as a material that stores potential energy that‚ when released‚ can be used as heat energy (Chemguide‚ 2003). The balanced combustion equation for pentanol
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Absolute entropy is entropy calculated relative to the absolute reference point determined by the third law of thermodynamics. Absolute humidity (specific humidity or humidity ratio) is the mass of water vapor present in a unit mass of dry air; that is‚ it is the ratio of the mass of water vapor to the mass of dry air in atmospheric air. Absolute pressure is the actual pressure at a given position and it is measured relative to absolute vacuum (i.e.‚ absolute zero pressure). Throughout this
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Cooling towers are a very important part of many chemical plants. They represent a relatively inexpensive and dependable means of removing low grade heat from cooling water. The make-up water source is used to replenish water lost to evaporation. Hot water from heat exchangers is sent to the cooling tower. The water exits the cooling tower and is sent back to the exchangers or to other units for further cooling. [pic] Types of Cooling Towers |[pic]
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The saturated unbranched alkenes will have a much quicker reaction rate but have low enthalpy values as it doesn’t take that much energy to break those bonds. Due to the neo-pentane having the larger density out of the other two isomers of pentane‚ it will have the lowest enthalpy value but the fastest reaction rate. Meaning that iso-pentane for higher concentrations will have high enthalpy values due to the trends in the graph meaning that it will produce the biggest flames out of the
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Thermochemistry Lab Purpose: This lab taught procedures for determining heat of capacity of a calorimeter and measuring enthalpy of change for three reactions. It also enforced methods of analyzing data obtained through experimentation and calculating enthalpy. These procedures are used in the branch of thermodynamics known as thermochemistry which is the study of energy changes that accompany chemical reactions. Concepts from this lab can be used to determine the potential energy of a chemical
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