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960 terms · page 38 of 40
System
The specific part of the universe chosen for thermodynamic study, separated from everything else by a real or imaginary boundary.
Analytical Chemistry & SpectroscopySystematic Error
An error that shifts every result in the same direction by a similar amount.
Chemical Kinetics & CatalysisTemperature Coefficient
The factor by which a reaction rate increases for a 10 °C rise in temperature.
Chemical Kinetics & CatalysisTermolecular Reaction
An elementary step requiring the simultaneous collision of three species.
Biochemistry & Polymer ChemistryTertiary Structure
The complete three-dimensional folded shape of a single polypeptide chain.
Chemical Bonding & Molecular StructureTetrahedral Geometry
A molecular shape with four bonded atoms directed to the corners of a regular tetrahedron at 109.5°.
Inorganic & Coordination ChemistryTetrahedral Splitting
The division of d orbitals under a tetrahedral field, with the e set below the t₂ set and a much smaller gap.
Stoichiometry & Chemical ReactionsTheoretical Yield
The maximum mass of product that could be obtained from a given quantity of limiting reagent, assuming complete conversion.
Stoichiometry & Chemical ReactionsThermal Decomposition
The breakdown of a compound into simpler substances brought about solely by heating.
Stoichiometry & Chemical ReactionsThermite Reaction
A highly exothermic reaction in which aluminium powder reduces a metal oxide to the molten metal.
Thermochemistry & ThermodynamicsThermochemical Equation
A balanced chemical equation that also states the enthalpy change for the amounts shown.
Thermochemistry & ThermodynamicsThermodynamic Equilibrium
The state in which a system's properties no longer change with time and all driving forces are balanced.
Chemical EquilibriumThermodynamic Equilibrium Constant
The dimensionless equilibrium constant defined using activities rather than concentrations or pressures.
Thermochemistry & ThermodynamicsThermodynamics
The branch of science dealing with energy, its transformations, and the direction in which processes occur.
Nuclear & RadiochemistryThermonuclear Reaction
A fusion reaction sustained by the extremely high temperatures of the reacting material itself.
Biochemistry & Polymer ChemistryThermoplastic
A polymer that softens on heating and hardens again on cooling, reversibly and repeatedly.
Biochemistry & Polymer ChemistryThermosetting Polymer
A polymer that sets permanently on first heating and cannot be softened again.
Analytical Chemistry & SpectroscopyThin Layer Chromatography
A chromatographic technique using a thin layer of adsorbent coated on a flat plate.
Thermochemistry & ThermodynamicsThird Law of Thermodynamics
The entropy of a perfect crystalline substance approaches zero as the temperature approaches absolute zero.
Chemical Bonding & Molecular StructureThree-Centre Two-Electron Bond
A bond in which a single pair of electrons is shared between three atoms rather than two.
Chemical Kinetics & CatalysisThreshold Energy
The minimum total energy that colliding molecules must possess for the collision to be capable of reaction.
Acids, Bases & SaltsTitration
A quantitative technique in which a solution of known concentration is added to another until the reaction between them is exactly complete.
Acids, Bases & SaltsTitration Curve
A plot of pH against the volume of titrant added during an acid–base titration.
Atomic Structure & PeriodicityTransition Element
An element whose atom or a stable ion has a partially filled d subshell.