Aim: To calculate the enthalpy change of neutralization of the given pairs of acid and base. Theory: When alkali neutralizes an acid‚ a salt and water are formed. Aqueous hydrogen ions‚ H+(aq) from the acid react with the hydroxide ions‚ OH-(aq) from the alkali‚ forming water. Ionic equation: H+ (aq)+OH- (aq) → H2O (l) The identity of the salt will depend on the nature of the acid and alkali used. The combination of H+ and OH- ions in this way releases energy. In this practical‚ the enthalpy
Premium Sodium hydroxide Thermodynamics
experiment‚ the group were able to perform the following objectives; to compute the heat capacity of a Styrofoam-cup calorimeter‚ and also to compute the heat of neutralization of 1.0 M hydrochloric acid and 1.0 M sodium hydroxide‚ the heat of dilution of concentrated sulfuric acid‚ and the heat of solution of solid ammonium chloride The sixth experiment was named "Calorimetry" wherein it is the measurement of how much heat is gained or released by a system as a chemical reaction occurs within it. The
Premium Energy Enthalpy Hydrochloric acid
Chemistry Lab #1 THER 368: Heat of Neutralization Objective The purpose of this lab was to: * Determine the heat of neutralization for the reaction of sodium hydroxide (NaOH) and hydrochloric acid (HCI). Requirement The heat of neutralization (∆Hneutzn ) is the heat transferred when 1 mol of an acid reacts with 1 mol of a base. This heat is generally reported in either kilojoules per mole (kJ/mol) or kilocalories per mole (kcal mol). The reaction of HCI and NaOH solutions
Premium Sodium hydroxide Temperature Thermodynamics
Heat of Neutralization Introduction: The purpose of this experiment was to measure‚ using a calorimeter‚ the energy changes accompanying neutralization reactions. In order to measure the amount of heat produced by a reaction‚ an instrument called a calorimeter was used. The calorimeter used in this experiment was somewhat rudimentary. It was constructed as shown in the following picture: After finding the heat capacity of the calorimeter‚ the student and partner neutralized two acids and
Premium Volume Thermodynamics Acid dissociation constant
Calorimetry is the science of measuring heat flow‚ and heat is defined as thermal energy flowing from an object at a higher temperature to one at a lower temperature. For example‚ if a chunk of metal at room temperature is placed in a beaker of boiling water‚ the metal will absorb heat from the water until it is at the same temperature as the boiling water. Scientists also often study the heat associated with different physical and chemical changes. Ideally‚ the heat changes resulting from physical and
Premium Sodium hydroxide Chemical reaction Thermodynamics
of apparatus‚ it is assumed that no heat is transferred between the calorimeter and the surroundings‚ and that no heat is absorbed or released by the cup. This allows for determination of enthalpy change‚ which will then allow for the calculation of heat absorbed or released. The specific heat capacity of a substance is the amount of thermal energy required to heat one gram of that substance by one degree. It is an intensive property‚ as opposed to the heat capacity‚ which is an extensive property
Free Thermodynamics Enthalpy Energy
SAFETY General WHMIS beforehand – no messing around on anything‚ no food/drink anywhere PPE – goggles‚ coat‚ feet Treatment Skin Chem: emergency shower – TA/HS Eye Chem: eye wash – 10 mins. TA/HS Fire Emergency kill switch for gas‚ electricity and water – leave and set the alarm Stop drop and roll Apparati should be clear of any controls or switches‚ keep vapours to minimum/take need Extinguishers – on the wall inside each 1st year lab Class A - ordinary combustibles
Premium Acid
change in temperature‚ compared to Reaction 3’s change in temperature. Reaction 1 was the dissolution of solid sodium hydroxide in water with a ΔH°rxn of -47047 J/mol‚ Reaction 2 was the neutralization of liquid sodium hydroxide with HCl with a ΔH°rxn of -31289 J/mol and Reaction 3 was the dissolution and neutralization of solid NaOH with HCl with a ΔH°rxn of -91000 J/mol. Consequently‚ the sum of Reaction 1 and Reaction 2 was -78336 J/mol‚ similar to the ΔH°rxn for Reaction 3. Table 2 displays the percent
Premium Chemical reaction Chemistry Chlorine
Calorimetry To determine the specific heat of a metal and its approximate atomic mass. To determine the heat of neutralization for a strong acid-strong base reaction. To determine the quantity and direction of heat flow for the dissolution of salt. Post Lab Questions and Answers: 1. In parts A and B in‚ the calorimeter‚ although a good insulator‚ absorbs some heat when the system is above room temperature. Is the reported value for the specific heat of the metal too high or too low? Explain
Premium Thermodynamics Energy Heat
be able to determine the specific heat of a reaction by using a calorimeter. A calorimeter is a device used to determine the specific heat of chemical reaction or a physical change. The specific heat a reactions is used to refer to the amount of heat that is lost or gained when one gram of a particular substance increases or decreases by one degree Celsius. When a chemical reaction occurs in an open container most of the energy gained or lost is in the form of heat. Almost no work is done (i.e. nothing
Premium Thermodynamics Ammonia Temperature