Bond enthalpies - Study guides, Class notes & Summaries

First law of thermodynamics - ANSWER-- the total energy of the universe is constant - energy is only converted from one form to another; cannot be created or destroyed - law of conservation of energy Energy - ANSWER-the capacity to do work or produce heat calorimetry - ANSWER-isolated system where no energy or matter is exchanged with the surroundings; it is used to measure heat absorbed/released in a reaction What does the heat absorbed/released depends on? - ANSWER-1. how exothermic...

Unit 6: Principles and Applications of Chemistry II Delivery guidance Scientists and laboratory technicians must be able to use and apply key science concepts to work efficiently and effectively in science and science-related organisations. This unit builds on and extends the key science concepts covered in Unit 2: Principles and Applications of Chemistry I. A strong grasp of these concepts will enable learners to use and apply their knowledge and understanding in vocational contexts...

Chemistry II ACS Exam 91 Questions with Verified Answers Phase - CORRECT ANSWER a physically distinct and homogenous part of a system intermolecular forces - CORRECT ANSWER the attractive and repulsive forces among the particles-molecules, atoms or ions in a sample of matter heat of vaporization - CORRECT ANSWER the enthalpy change occurring when 1 mol of a liquid substance vaporizes heat of fusion - CORRECT ANSWER the enthalpy change occurring when 1 mol of a solid melts heat of ...

Thin layer chromatography can use silica plates which are very polar. Will polar or non polar substances have lower Rf values on this plate? - Polar substances - they will have a higher affinity for the silica and thus will not travel as far as the non polar substances A titration of a strong acid with a strong base or vice versa has an equivalence point around what pH? - 7 What type of bond is usually disrupted during denaturation of proteins? - H bond Is uracil a purine or py...

AQA A level Chemistry 3.1.8 – Thermodynamics Already Passed What are standard conditions? 298K/25°C 100kPa/1 atm 1 moldm-3 Enthalpy change of formation The enthalpy change when 1 mole of a compound is formed from its constituent elements under standard conditions, with all reactants and products in their standard states. Enthalpy change of combustion The enthalpy change when 1 mole of a substance is burned completely in oxygen. Enthalpy change of atomisation The enthalpy change that accomp...

MCAT Practice Exam Questions Answered 100% correct 2023 Thin layer chromatography can use silica plates which are very polar. Will polar or non polar substances have lower Rf values on this plate? Polar substances - they will have a higher affinity for the silica and thus will not travel as far as the non polar substances A titration of a strong acid with a strong base or vice versa has an equivalence point around what pH? 7 What type of bond is usually disrupted during denatura...

Thin layer chromatography can use silica plates which are very polar. Will polar or non polar substances have lower Rf values on this plate? - Polar substances - they will have a higher affinity for the silica and thus will not travel as far as the non polar substances A titration of a strong acid with a strong base or vice versa has an equivalence point around what pH? - 7 What type of bond is usually disrupted during denaturation of proteins? - H bond Is uracil a purine or py...

Detailed notes on Unit 8 - Energetics I covering all the specification points, and allowed me to achieve an A* in chemistry. Covers enthalpy changes, thermochemical equations, Hess's law, Hess cycles, example calculations, standard enthalpy of formation, reaction, combustion, neutralisation and atomisation, bond enthalpy calculations with examples and enthalpy titrations.

Detailed notes for AQA AS level chemistry unit 3.1.4 (energetics). Covers: enthalpy changes and calculations, specific heat capacity, combustion practical, Hess's Law and mean bond enthalpies. Includes example calculations and additonal notes of experimental-based questions (related to percentage error/uncertainty, and experimental vs theoretical values).

MCAT Practice Exam Questions and Answers 100% Pass Thin layer chromatography can use silica plates which are very polar. Will polar or non polar substances have lower Rf values on this plate? Polar substances - they will have a higher affinity for the silica and thus will not travel as far as the non polar substances A titration of a strong acid with a strong base or vice versa has an equivalence point around what pH? 7 What type of bond is usually disrupted during denaturation of proteins? H...