Standard enthalpy changes - Study guides, Class notes & Summaries
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CHEM 210 MODULE 3 EXAM QUESTIONS AND CORRECT ANSWERS, WITH COMPLETE SOLUTION 2024.
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CHEM 210 MODULE 3 EXAM QUESTIONS AND CORRECT ANSWERS, WITH COMPLETE SOLUTION 2024. 
 
What is meant by the term average bond enthalpy? 
(Average enthalpy change) when one mole of bonds 
 
of (gaseous covalent) bonds is broken 
The calculated value of ΔHc from this experiment is different from the value obtained 
from data books. 
Apart from heat loss, suggest two reasons for the difference. 
Assume that the calculation has been carried out correctly. 
incomplete combustion 
non-standard conditi...
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General Chemistry ACS Final Exam 89 Questions with Verified Answers,100% CORRECT
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General Chemistry ACS Final Exam 89 Questions with Verified Answers 
 
Protons - CORRECT ANSWER defines the element; positive charge; equal to the atomic number 
 
Neutrons - CORRECT ANSWER equal to mass number-number of protons; neutral charge 
 
Electrons - CORRECT ANSWER negative charge; dependent on the charge of the atom 
 
Cations - CORRECT ANSWER Positively charged ions 
 
Anions - CORRECT ANSWER Negatively charged ions 
 
Isotopes - CORRECT ANSWER when the number of neutrons varies but i...
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CHEM 210 MODULE 3 EXAM QUESTIONS AND CORRECT ANSWERS, WITH COMPLETE SOLUTION 2024.
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CHEM 210 MODULE 3 EXAM QUESTIONS AND CORRECT ANSWERS, WITH COMPLETE SOLUTION 2024. 
 
What is meant by the term average bond enthalpy? 
(Average enthalpy change) when one mole of bonds 
 
of (gaseous covalent) bonds is broken 
The calculated value of ΔHc from this experiment is different from the value obtained 
from data books. 
Apart from heat loss, suggest two reasons for the difference. 
Assume that the calculation has been carried out correctly. 
incomplete combustion 
non-standard conditi...
-
APPLIED SCIENCE UNIT 6: PRINCIPLES AND APPLICATIONS OF CHEMISTRY II
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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...
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IB HL chemistry R1 terminology Questions and Answers Latest 2024
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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...
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Chemistry II ACS Exam 91 Questions with Verified Answers,100% CORRECT
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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 ...
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A LEVEL CHEMISTRY & Chemical Process – Energetics Exam Questions and Answers
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Define Enthalpy - ANSWER-A measure of the heat in a chemical system 
 
Standard Pressure - ANSWER-1 atm 
 
Standard Temperature - ANSWER-298 K 
 
Standard Concentration - ANSWER-1 mol/dm3 
 
Define enthalpy change of reaction - ANSWER-enthalpy change when molar quantities, as stated in an equation, react under standard conditions 
 
Define enthalpy change of formation - ANSWER-enthalpy change when 1 mole of a compound is formed from its elements under standard conditions with all reactants and p...
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BIO 441A EXAM 3 STUDY GUIDE WITH COMPLETE SOLUTION.
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BIO 441A EXAM 3 STUDY GUIDE WITH COMPLETE SOLUTION. 
LECTURE ONE - METABOLISM INTRODUCTION 
● Autotrophs synthesize all their own cellular constituents from simple molecules 
● Heterotrophs obtain energy through oxidation of organic compounds and therefore rely 
on autotrophs 
● Metabolism involves many reactions such as 
○ Glycolysis/gluconeogenesis 
○ The citric acid cycle 
○ Oxidative phosphorylation 
● Catabolism is the degradation of biomolecules 
○ Energy rich nutrients are...
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Chemistry 1025 Lab Final (A+ Guaranteed)
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Accuracy correct answers Measurement of how close a result comes to the true value. Sometimes involves calibration with. A known standard 
 
Precision correct answers Measure of the agreement between 2 or more measurements that are averaged to give reported value. 
 
Dependent variable correct answers Quantity that changes in response to changes of independent variable 
 
Independent Variable correct answers The quantity under control that determines the value of other variables. Changed to obse...
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General Chemistry II Final Exam (ACS) UVU 273 Questions with Verified Answers,100% CORRECT
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General Chemistry II Final Exam (ACS) UVU 273 Questions with Verified Answers 
 
If the pressure of a gas is increased at constant temperature, the volume ___. - CORRECT ANSWER Decreases 
 
If the pressure of a gas is decreased at constant temperature, the volume ___. - CORRECT ANSWER Increases 
 
If the volume of a gas is decreased at constant pressure, the temperature ___. - CORRECT ANSWER Decreases 
 
P ? T ? V ? - CORRECT ANSWER Pressure does the opposite of volume. 
 
Which of the following...
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