Reactants break - Study guides, Class notes & Summaries
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IB Chemistry Topic 5 Latest Update Graded A+
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IB Chemistry Topic 5 Latest Update 
 
Graded A+ 
 
Enthalpy The amount of heat released (exothermic) or absorbed (endothermic) during a 
chemical reaction (the energy needed for the reaction to occur) 
This can be lowered with the presence of a catalyst. 
 
Change in Enthalpy Hproducts -Hreactants 
 
Specific heat equation c= q in Joules (or Change in H)/mass(g)(change in temp) 
 
Specific heat of water 4.18 J/gdegreesC 
**NOTE: Usually in kJ 
 
Endothermic v. Exothermic Endothermic: Absorbing e...
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Biology 1406 Lecture test 2 (Ch. 4-6) Rated A+
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Biology 1406 Lecture test 2 (Ch. 4-6) 
 
Rated A+ 
 
Metabolism Sum of all chemical activity 
 
Catabolic pathway break down molecules 
 
anabolic pathway build more complex molecules 
 
bioenergetics study of how organisms manage their energy resources 
 
Energy The capacity to do work or cause 
change. 
 
Potential Energy Energy by position or state. Examples - Water held back by a dam, 
chemical energy and electrical energy in a battery. 
 
Kinetic Energy Energy in motion or at work. EX: movi...
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Biology 1406 Lecture test 2 (Ch. 4-6) Rated A+
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Metabolism Sum of all chemical activity 
Catabolic pathway break down molecules 
anabolic pathway build more complex molecules 
bioenergetics study of how organisms manage their energy resources 
Energy The capacity to do work or cause 
change. 
Potential Energy Energy by position or state. Examples - Water held back by a dam, 
chemical energy and electrical energy in a battery. 
Kinetic Energy Energy in motion or at work. EX: moving water, energy released by breaking 
a chemical bond or electri...
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AQA A LEVEL Chemistry Questions & Correct Answers/ Graded A+
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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...
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CHEM 162 Exam 2 with complete verified solutions 2025
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Vapor Pressure is a form of Dynamic Equilibrium 
Molecules are constantly moving between phases, but the rate at which the molecules move from the liquid ↔ gas phase is constant 
 
 
 
Chemical Equilibrium 
a state in which the rate of a forward reaction and the rate of the reverse reaction are the same 
as the reaction uses its reactants the forward reaction starts to slow down 
 
 
 
How is chemical equilibrium reached? 
reactants and products are still forming when it is reached, just at th...
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Life 102 Exam 1 CSU Arthun Questions and Answers Already Passed
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Life 102 Exam 1 CSU Arthun Questions 
 
and Answers Already Passed 
 
At what organizational level is life's uniformity most evident? Most evident in cells 
 
At what organizational level is life diversity most evident? Most evident in organisms 
 
How do Atoms fill their Valence shell? Donate or accept electrons from another atom or two 
atoms can share an electron pair creating a covalent bond. 
 
What happens when an atom gains or loses an electron? It becomes ionic 
 
96% of living mater is...
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AQA A-level Chemistry paper 2 Questions & Correct Answers/ Graded A+
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elative atomic mass (Ar) 
: Average mass of an atom compared with one twelth of the mass of an atom of carbon 
12 
Electronegativity 
: Power of an atom to attract the pair of electrons in a covalent bond 
Standard enthalpy of combustion 
: Enthalpy change when 1 mole of a substance burns completely in oxygen under 
standard conditions with all reactants and products being in their standard state 
Standard enthalpy of formation 
: Enthalpy change when 1 mole of a compound is formed from it's ...
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Chem 1020 Exam #4 Questions With 100% Correct Answers 2023
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Chem 1020 Exam #4 Questions With 100% Correct Answers 2023 
Chemical Reaction 
Process in which at least one new substance is produced as a result of chemical change 
 
 
 
Combination 
Chemical reaction in which a single product is produced from two (or more) reactants 
 
 
 
Decomposition 
Chemical reaction in which a single reactant is converted into two (or more) simpler substances (elements or compounds) 
 
 
 
Displacement or Single Replacement 
Chemical reaction in which an atom or molecu...
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STAAR Review 8th grade Science questions fully solved & updated 2024
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Atom 
the basic building block of matter that make up everyday objects 
 
 
 
Nucleus (atom) 
the center of an atom that contains the protons and neutrons 
 
 
 
 
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Electron Cloud 
the area around the nucleus of an atom where electrons are found 
 
 
 
Protons 
positive charged subatomic particles found in the nucleus 
 
 
 
Neutrons 
neutral charged subatomic particles fou...
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"AQA A-level BIOLOGY 7402/1 Paper 1 Question Paper Mark scheme" Latest update 2023-2024
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"AQA A-level BIOLOGY 7402/1 Paper 1 Question Paper Mark scheme" Latest update 
Water removed from the reactants joining two molecules together forming a chemical bond 
Condensation 
The addition of water to the reactants to break a chemical bond between 2 molecules 
Hydrolysis 
1. Add Benedict's reagent. 2. Heat the solution in a water bath for 5 minutes at 95 degrees Celsius. 3. Change from blue to brick red as CuO formed 
Test for Reducing Sugars (3) 
Smaller units from which larger molecu...
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