Hess law Study guides, Revision notes & Summaries

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...

internal energy - ΔU = Uf − Ui First Law of Thermodynamics - ΔU = q + w heat - substances not changing phase (per gram) - q = m⋅Cs⋅ΔT heat - substances not changing phase (per mol) - q = n⋅Cm⋅ΔT heat - substances that are changing phase (per gram) - q = m⋅ΔHtrans heat - substances that are changing phase (per mol) - q = n⋅ΔHtrans work - constant external pressure (Pext) - w = −PextΔV work - constant external pressure (Δngas) - ...

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 A LEVEL Chemistry QUESTIONS AND ANSWERS LATEST TOP SCORE. Relative atomic mass - ANS.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 - ANS.Average mass of a molecule compared to 1/12th of the mass of a carbon-12 atom The Avogradro constant - ANS.the number of particles in a mole ideal gas equation - ANS.pV = nRT empirical formula - ANS.the simplest whole number ...

AQA A LEVEL Chemistry All Answers Correct 2024 Relative atomic mass of an atom of Carbon-12 Relative molecular mass carbon-12 atom The Avogradro constant ideal gas equation The average mass of an atom of an element, relative to 1/12th of the mass Average mass of a molecule compared to 1/12th of the mass of a the number of particles in a mole pV = nRT empirical formula the simplest whole number ratio of atoms of each element in a compound percentage atom econom...

Introduction To Law Enforcement and Criminal Justice 11th Edition by Kären M. Hess - Test Bank

Critical Thinking and Ethic Cases Ch.15 Questions and Answers100% Accurate Siva V. 1138 LLC (Facts) -Five Members entered into a Limited Liability -Ruthiran Siva Owned building they rented -It was a 5 year lease for $4,000 a month -Six months later 1138 was in default and broke lease agreement -Siva sued 1138 and Hess personally Siva V. 1138 LLC, (Decision) The court of appeals held that Hess, as a member owner of 1138 LLC, was not personally liable for the debt that the LLC owed t...

Civil Procedure Final Exam litigation - ANS the process by which parties seek to resolve their dispute by going to court Sources of legal authority - ANS A. 1) constitutions (highest form of law); 2) statutes (acts of congress, peoples reps from each state); 3) court rules (procedures in every court system); 4) case law primary, and potentially binding ; 5) treaties; 6) regulations; 7) ordinances stare decisis - ANS top down precedent, must abide by decided cases-This e...

Chapter 3: Writing Effective Reports MULTIPLE CHOICE 1. 2. 3. 4. 5. 6. 7. The statement “the man could not walk a straight line” is an example of a. a fact. b. a conclusionary statement. c. an observation. d. any of these choices. ANS: B PTS: 1 OBJ: Compare how to differentiate among facts, inferences and opinions. REF: p.78 The term PC (probable cause) is needed in which report? a. crime report b. arrest report ANS: B OBJ: Summarize the common problems that occur in many...

AQA A-level Chemistry Paper 1 |35 Questions| With Correct Answers. Explain what is meant by the term co-ordinate bond Define the term Ligand What can lattice enthalpy defined as? (2 things) Why is the experimental value for lattice dissociation of some compounds greater than the theoretical value? what does the perfect ionic model assume? What 2 things might cause a different lattice enthalpy? why is the lattice enthalpy greater for ions with a high charge? Why is the lattice enthalpy gr...