The reaction mixture is called the system and anything around the system is called the surroundings. ➔ Thermochemical equations give the balanced equation with the enthalpy change. ◆ H₂ (g) + 1/2 O₂ (g) → H₂O (l) ; ∆H°= 286 kJ mol⁻¹ ◆ H₂ (g) + 1/2 O₂ (g) → H₂O (g) ; ∆H°= 242 kJ mol⁻¹ ● The reason there is a difference in the enthalpy is because the first equation the water produced is in liquid state; this allows through convection currents for the heat to be kept. ➔ In exothermic reactions heat is released to the surroundings
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MARKETING ESSENTIALS Assignment on MARKETING MIX Of NESCAFE Submitted By: Sarathkumar (facebook) (files2.coloribus.com) (photobuket) Introduction Marketing can be defined as the process of introducing a product or service to the world for the purpose of selling that product or service to the customers. Without marketing‚ product or services cannot be successfully provide value to customers based on their interests‚ needs and preferences. Marketing not only based on the selling of a products
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point of all alkaline metals. Its density is 1.74g/cm^3 and at room temperature (20°C) it is a solid. Magnesium is protected by a thin layer of oxide that is difficult to remove and is impermeable. It’s heat of fusion is 8.48 kJ/mole‚ and it’s heat of vaporization is 128 kJ/mol. The only way for magnesium to naturally occur is
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International Journal of Advanced Engineering Technology E-ISSN 0976-3945 Research Paper STUDY AND DEVELOPMENT OF COMPRESSED AIR ENGINESINGLE CYLINDER: A REVIEW STUDY *Mistry Manish K.1‚ *Dr.Pravin P.Rathod2‚*Prof. Sorathiya Arvind S.3 1 Address for Correspondence PG student 2 Associate professor 3 Associate professor Mechanical engineering Department‚ Government Engineering College Bhuj-370001(Kutch) ABSTRACT This paper is reports on the review of compressed air engine for the
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The Chemical Engineering Journal‚ 48 (1992) 17-29 17 Development and verification of a simulation model for a nonisothermal water-gas shift reactor Riitta L. Keiski”‚ Tapio SaImib and Veikko J. Pohjola” ‘Department bDepatiment of Process Engineering‚ of Chemical Engineering‚ University of Ouh‚ SF-90570 Oulu (Finland) Abo Akademi‚ SF-20500 Turku (Finland.. (Received December 29‚ 1989; in final from July 5‚ 1991) Abstract A fixed-bed test reactor suitable for studying non-isothermal
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Experiment 1 Separation of Mixtures Summary of Principles: Most of the materials we encounter in everyday life are not pure substances. Many materials such as sand are formed from physical combination of various substances‚ and are called mixtures. Mixtures can be classified into homogeneous and heterogeneous. The purpose of this lab is to learn how to separate individual components from a mixture through decantation‚ filtration‚ distillation‚ and crystallization. Pre-Lab Questions: Attached
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Heats of Reaction – Hess’s Law Overview Hess’s Law states that the energy change for a reaction depends on the enthalpy of the reactants and products and is independent of the pathway of the reaction. In this experiment you will use calorimetry to measure the heats of reaction for three reactions: Reaction 1 Reaction Equation NaOH(s) → Na+(aq) + OH-(aq) Solid NaOH is dissolved in water 2 Na+(aq) + OH-(aq) + H+(aq) + Cl-(aq) → Na+(aq) + Cl-(aq) + H2O(l) Solutions of NaOH and HCl are mixed 3 NaOH(s)
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White Chocolate The history of white chocolate The first chocolate bar was invented in 1847 by the Fry Brothers in Bristol‚ England. White chocolate first appeared in Switzerland in the 1930’s. It was invented by Nestle to use excess cocoa butter. The first bar’s name was called Galak. A year later in the USA‚ white chocolate was first made by the M&M Candy Company. In‚ 1948 introduced by Nestle was the Alpine White chocolate bar containing white chocolate and chopped almonds. In 1993
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Hess Law Lab DESIGN Aspect 1: Problem: What is the molar enthalpy of formation of magnesium oxide? Variables: Manipulated: None Responding: None Controlled: Isolation of calorimeter‚ concentrations of substances involved. Aspect 2: Background Information: Assumptions: Specific heat capacity of water‚ we assume that the acid has the same qualities as water including heat capacity‚ and we assume the enthalpy of formation for magnesium oxide from the data booklet for theoretical
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MA‚ PAULINE Date Performed: 10 SEPTEMBER 2014 NACIONGAYO‚ DANIELLE Date Submitted: 17 SEPTEMBER 2014 TEDERA‚ YVES HEAT EFFECTS AND CALORIMETRY Experiment No. 2 I. RESULTS A. Determination of Heat Capacity In this experiment‚ an improvised calorimeter was used to determine the heat capacity. The calorimeter weighed 4.47 grams prior to the addition of water. Tap water‚ 40 mL to be exact‚ was added to the calorimeter which increased the weight to 43.87 grams. The water was measured using
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