Enthalpy of formation Study guides, Class notes & Summaries

Chemistry Straighterline questions and answers 100% guaranteed success. An endothermic reaction causes the surroundings to: A. warm up B. become acidic C. condense D. decrease in temperature E. release CO2 - correct answers.D An exothermic reaction causes the surroundings to: A. warm up B. become acidic C. expand D. decrease its temperature E. release CO2 - correct answers.A Copper metal has a specific heat of 0.385 J/g•oC and has a melting point of 1083oC....

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...

prokaryote correct answers small, simple, single celled organisms adapt to change very quickly does not have a nucleus does not have membrane bound organelles have ribosomes for protein synthesis from an RNA message eukaryote correct answers true nucleus large, complex cells, make up multi-cellular organisms have organelles- specialized functions differentiation of cells to unique and specialized cell types linear DNA L amino acids correct answers the only type of amino acid used t...

CHEM191 Module 2 Exam Questions With 100% Correct Answers What is kinetic energy? - answerenergy of motion what is potential energy? - answerenergy of relative position 0 chemical bonds act as a store of potential energy what happens in terms of heat when a chemical reaction happens? - answerheat (q) is either absorbed or released by the reaction. what is enthalpy? - answerthe heat of reaction measured under conditions of constant pressure. how can the change in enthalpy be determined? ...

AQA A LEVEL Chemistry questions and answers 100% guaranteed success. Relative atomic mass - correct answer. 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 - correct answer. Average mass of a molecule compared to 1/12th of the mass of a carbon-12 atom The Avogradro constant - correct answer. the number of particles in a mole ideal gas equation - correct answer. pV = nRT empirica...

CHEM191 Module 2 Exam Questions With 100% Correct Answers What is kinetic energy? - answerenergy of motion what is potential energy? - answerenergy of relative position 0 chemical bonds act as a store of potential energy what happens in terms of heat when a chemical reaction happens? - answerheat (q) is either absorbed or released by the reaction. what is enthalpy? - answerthe heat of reaction measured under conditions of constant pressure. how can the change in enthalpy be determined? ...

System - The portion of the universe we have singled out for study surroundings - Everything else in the universe universe - System and surroundings work - the action of a force through a distance heat - Transfer of energy from hotter to colder object heat capacity - The amount of heat needed to raise the temperature by 1 K Heat Tax - Increase in surroundings comes from the heat from the system Kinetic energy - Energy of motion potential energy - Energy of an object by virtue of its posi...

Test for carbonates - correct answer - add dilute HCL - it makes carbon dioxide test for carbon dioxide by bubbling it through lime water Test for ammonium ions - correct answer -add sodium hydroxide -warm the mixture -hover damp red litmus paper over it , if it turns blue the ions are present Test for sulphate ionz (SO4 2-) - correct answer - add dilute HCL - then add BaCl2 - BaSO4 is made which is insoluble in water so a white precipitate will be formed Test for Halides (Cl-,...

first ionization energy : The energy required to convert one mole of gaseous atoms into gaseous atoms with a single positive charge standard enthalpy of formation : the enthalpy change when 1 mole of a compound is formed from its elements in their standard states under standard conditions Standard Enthalpy of Atomisation : The enthalpy change when one mole of gaseous atoms is formed from an element in its standard state Lattice enthalpy : The enthalpy change that occurs when one mol...

General Chemistry ACS Study Guide 69 Questions with Verified Answers Isotopes - CORRECT ANSWER when the number of neutrons varies but it has the same number of protons ex) Ne-20 and Ne-22` What was believed until the beginning of the 20th century? - CORRECT ANSWER That all physical phenomena were deterministic Light - CORRECT ANSWER Form of electromagnetic radiation What is electromagnetic radiation composed of? - CORRECT ANSWER perpendicular oscillating waves, one for the magnetic f...