Chapter 15 of Chemical Thermodynamics Review Questions with complete Solutions Rated 100%
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Course
Chemical Thermodynamics
Institution
Chemical Thermodynamics
Chapter 15 of Chemical Thermodynamics Review Questions with complete Solutions Rated 100%
Absolute Entropy (of a substance) - Answers The entropy of a substance relative to its entropy in a perfectly ordered crystalline form at 0 K (where its entropy is zero)
Bomb Calorimeter - Answers A device u...
Chapter 15 of Chemical Thermodynamics Review Questions with complete Solutions Rated 100%
Absolute Entropy (of a substance) - Answers The entropy of a substance relative to its entropy in a
perfectly ordered crystalline form at 0 K (where its entropy is zero)
Bomb Calorimeter - Answers A device used to measure the heat transfer between system and
surroundings at constant volume
Bond Energy - Answers The amount of energy necessary to break one mole of bonds in a gaseous
substance to form gaseous products at the same temperature and pressure
Calorimeter - Answers A device used to measure the heat transfer that accompanies a physical or
chemical change
Dispersal of Energy - Answers The degree to which the total energy of a system can be distributed
among its particles
Dispersal of Matter - Answers The degree to which the particles of a sample can be distributed in space;
aka disorder
Endothermic Process - Answers A process that absorbs heat
Enthalpy Change (Delta H) - Answers The quantity of heat transferred into or out of a system as it
undergoes a chemical or physical change at constant temperature and pressure
Entropy (S) - Answers A thermodynamic state function that measures the dispersal of energy and the
dispersal of matter (disorder) of a system
Equilibrium - Answers A state of dynamic balance in which the rates of forward and reverse processes
(reactions) are equal; the state of a system when neither the forward nor the reverse process is
thermodynamically favored
Exothermic Process - Answers A process that gives off (releases) heat
First Law of Thermodynamics - Answers The total amount of energy in the universe is constant (aka the
Law of Conservation of Energy); energy is neither created nor destroyed in ordinary chemical reactions
and physical changes
Gibbs Free Energy (G) - Answers The thermodynamic state function of a system that indicates the
amount of energy available for the system to do useful work at constant T and P. It is defined as
G = H - TS; aka free energy
Heat of Formation - Answers See standard molar enthalpy of formation
Hess's Law of Heat Summation - Answers The enthalpy change for a reaction is the same whether it
occurs in one step or a series of steps
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