of Reaction and Hess’s Law Objectives: 1. To calculate the heat of reaction of a given reaction using the concepts derived from Hess’s Law. Pre-lab Questions: 1. Define Heat of Reaction. The enthalpy change associated with the completion of a chemical reaction. 2. Define Specific Heat. The energy it takes to raise the temperature of 1 gram of a substance by one degree Celsius. 3. Calculate the heat of reaction assuming no heat is lost to the calorimeter. Use correct significant figures.
Thermochemistry: An Ice Calorimeter Determination of Reaction Enthalpy D. F. Nachman 6/23/2010 Abstract: An ice calorimeter was used to study the reaction of magnesium metal and 1.00M sulfuric acid solution: Mg(s) + H2SO4(aq) →MgSO4(aq) + H2(g). We found the experimental molar enthalpy of reaction to be ΔH = –355 ± 17 kJ/mol at 0°C, 24% lower than the textbook value of ΔH° = –466.9 kJ/mol, reported at 25°C. Introduction Whether a chemical reaction occurs spontaneously or is driven by an outside
Purity and purifications of solids using melting points. Tatyana Aleksandrova CHE 337, Section 001 Department of Chemistry Portland State University, Portland, OR Abstract Melting points of Naphthalene/Biphenyl mixtures differing in their percent compositions were observed and plotted on a graph that indicated eutectic point of the mixture to be at 50 mole percent Naphthalene. Using melting
1.3 Heat transfer fluids Based fluid will meet your system’s thermal requirements, you can choose between Heat transfer fluids are those fluids which allow the heat to transfer through itself. This work surveys the veriety of heat transfer fluids and the systems in which they are used .The fluids considered are those found in process and energy application: water(vapour and liquid), gases, organic fluids, moltan salt,and liquid metal. Refrigrents are not included. For completeness,the basic concept
THE LATENT HEAT CALORIMETER The specific heats of various solid samples were measured Investigate specific heat as a function of temp 1. INTRODUCTION uses for latent heat, meteroreology, and specific heat, cooking pans The specific heat capacity is defined as the amount of energy required to raise a substance by a temperature… tippler?. It is a fundamental property of materials and thus its determination has been given great importance throughout history. Prior to thermodynamic research
Determination of the Calorific Value of Fuels Aim: To quantify the amount of energy produced by different fuels and to determine which fuel is more efficient (has a higher calorific value). Introduction: The easiest way to achieve our aim is by heating a substance with a known specific heat capacity and using the energy released from burning our fuels. This will give us the value of the heat energy released by the combustion of our two fuels. The chemical reaction for combustion: FUEL
lysozyme; such a biosensor will offer an alternative, sensitive and versatile method for protein detection. 1.4.6 Flow injection chemiluminescence system A novel analytical procedure, based on chemiluminescence (CL) detection, was described for the determination of lysozyme at ng/ml levels using controlled-reagent-release technology in a flow injection system. The analytical reagents involved in the CL reaction, including luminol and periodate, were immobilized on the anion-exchange resins in the flow
Detailed thermal history within the fusion and heat-affected zones, including temperature distributions in welding are still subjects of modern research. Knowledge of the thermal history will considerably help in controlling
Title : Expt.1 Determination of the enthalpy (heat) of reaction of a monobasic acid with sodium hydroxide Experiment no : 1 Experiment title : Determination of the enthalpy (heat) of reaction of a monobasic acid with sodium hydroxide Objectives: 1) To understand the enthalpy chemistry. 2) To determine the calorimeter constant. 3) To determine the enthalpy reaction of acid-base reactions. 4) To study the exothermic reaction. Apparatus and Materials : * Dewar flask
of additive volumes – Mole fraction , Volume fraction and partial pressure, Equivalent Gas const. And Molecular Internal Energy, Enthalpy, sp. Heats and Entropy of Mixture of perfect Gases and Vapour, Atmospheric air - Psychrometric Properties – Dry bulb Temperature, Wet Bulb Temperature, Dew point Temperature, Thermodynamic Wet Bulb Temperature, Specific Humidity, Relative Humidity, saturated Air, Vapour pressure, Degree of saturation – Adiabatic Saturation , Carrier’s Equation – Psychrometric chart