Hess law Study guides, Revision notes & Summaries

This is a comprehensive and detailed lab report in Hess' law for chem 213. Quality stuff!! You'll need it!!

Relative atomic mass : The average mass of an atom of an element, relative to 1/12th of the mass of an atom of Carbon-12 Relative molecular mass : Average mass of a molecule compared to 1/12th of the mass of a carbon-12 atom The Avogradro constant : the number of particles in a mole ideal gas equation : pV = nRT empirical formula : the simplest whole number ratio of atoms of each element in a compound 2 percentage atom economy : (Mass of desired product/total mass of reactants) x 1...

Chemistry 115 Final Exam Questions with Verified Solutions Any ionic compound containing group IA or NH4+ cations are.... Always Soluble Ionic compounds containing NO3-, NO2-, ClO3-, ClO4-, C2H3O2-, & HCO3- anions are Always Soluble Ionic compounds containing Cl-, Br-, & I- anions are soluble EXCEPT when combined with... Ag, Hg, and Pb cations Ionic compound containing SO4^2- are soluble EXCEPT when combined with... Ag, Hg, Pb, Ca, Sr, Ba Ionic compounds containing So3^2-, S^2-, CO3^2-, PO4^...

AQA CHEMISTRY A LEVEL WITH COMPLETE SOLUTIONS covalent bond - ANSWER-a shared pair of electrons between non-metal elements co-ordinate bond - ANSWER-a shared pair of electrons where both electrons are supplied by one atom repulsion in shapes of molecules - ANSWER-Lone pair-lone pair > lone pair-bonding pair > bonding pair-bonding pair electronegativity - ANSWER-the power of an atom to attract the pair of electrons in a covalent bond hess' law - ANSWER-Total enthalpy chang...

Enthalpy of combustion (∆Hc) - ANSWER-The enthalpy change that occurs when one mole of a substance is burnt completely in oxygen under standard conditions Enthalpy of Formation (∆Hf) - ANSWER-The enthalpy change that occurs when one mole of a substance is formed from its elements in their standard states under standard conditions Enthalpy - ANSWER-The thermal energy stored in a chemical system. It is defined by: Enthalpy = Internal energy of the system + (pressure x volume) H = U...

Standard enthalpy of formation correct answer: enthalpy change when it is made from the stable form of its elements at standard condition combustion enthalpy correct answer: exothermic, so always negative atomisation enthalpy correct answer: endothermic, so always positive ∆H(rxn)= correct answer: ∑∆Hºf(products) - ∑∆Hºf(reactants) standard enthalpy of formation correct answer: change of enthalpy during the formation of one mole of the substance from its constituent ...

AQA CHEMISTRY A LEVEL WITH COMPLETE SOLUTIONS covalent bond - ANSWER-a shared pair of electrons between non-metal elements co-ordinate bond - ANSWER-a shared pair of electrons where both electrons are supplied by one atom repulsion in shapes of molecules - ANSWER-Lone pair-lone pair > lone pair-bonding pair > bonding pair-bonding pair electronegativity - ANSWER-the power of an atom to attract the pair of electrons in a covalent bond hess' law - ANSWER-Total enthalpy chang...

ASVAB-NAVY 1. Which of these reduces friction: ball bearings 2. When a lobster grows a claw to replace one that was lost, the process is called: regeneration 3. Any astronomical body that revolves around a larger body is called: satellite

Thermochemistry : the study of energy changes that occur during chemical reactions and changes in state bond enthalpy : the energy needed to break one mole of bonds in gaseous molecules under standard conditions Molar enthalpy : The enthalpy change associated with a physical, chemical or nuclear change involving one mole of a substance. Kinetic energy : energy of motion of particles in a substance heat 2 | P a g e : The energy transferred from one object to another Calorimetry ...

Thermochemistry - CORRECT ANSWER-the study of energy changes that occur during chemical reactions and changes in state bond enthalpy - CORRECT ANSWER-the energy needed to break one mole of bonds in gaseous molecules under standard conditions Molar enthalpy - CORRECT ANSWER-The enthalpy change associated with a physical, chemical or nuclear change involving one mole of a substance. Kinetic energy - CORRECT ANSWER-energy of motion of particles in a substance heat - CORRECT ANSWER-The energ...