IB marking on the exam can be rather particular for specific points when "define" is requested in a question. This page is a compilation, (a work in progress as of Nov 2006), of these specific points when specific points should be included in a definition. Be sure to understand why the points are required.
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Name |
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a test) |
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Name |
Definition |
Explanation or Alternative Definition (don't use on
a test) |
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is defined as the change in thermal energy divided
by the change in temperature |
3.2.1 |
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is defined as the heat capacity per unit mass |
3.2.1 |
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the amount of heat energy added to or released from
a substance in order to change its state (between two of solid liquid
and gas), per unit mass |
3.2.8 |
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mole (abbreviated mol) |
the amount of substance that contains as many atoms
or molecules as there are in 12.00 grams of carbon 12 (whose atomic mass
is exactly 12u) |
iss Avogadro's number, 6.022x10**23, of particles
of any kind of substance (atoms, ions, molecules, or formula units). |
3.3.2 |
molar mass |
the mass of one mole of substance |
3.3.2 |
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Avogadro constant |
is the number of carbon-12 atoms in 12 grams carbon-12 IB uses 6.02 x 10**23 |
3.3.3 |
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thermal efficiency of
a heat engine |
9.2.9 |
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State |
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3.1.1 |
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relation between the Kelvin
and Celsius scales of temperature |
3.1.3 |
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temperature is a measure
of the average kinetic energy of the molecules
of a substance |
3.1.4 |
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internal energy is the
total potential and kinetic energy of molecules
in a substance |
3.1.5 |
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equation of state of an
ideal gas |
3.3.4 |
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first law of thermodynamics |
9.2.1 |
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first law of thermodynamics
is a statement of the principle of energy
conservation |
9.2.2 |
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Carnot's theorem |
9.2.11 |
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an expression for the efficiency
of a Carnot engine in terms of the temperatures
of the two reservoirs |
9.2.12 |
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heat can be completely
converted to work in a single process, but that
continuous conversion of heat into work requires a cyclical process and
the rejection of some heat |
9.3.1 |
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Kelvin-Planck formulation
of the second law of thermodynamics |
9.3.2 |
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entropy is a system property
that expresses the degree of disorder in
the system |
9.3.4 |
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the second law in terms
of entropy changes |
9.3.5 |
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Other
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ideal gas |
a theoretical gas which follows the ideal gas law. |
most gasses aproximate ideal gas behavior except at high pressuresand low temperatures. (where intermolecular forces and change of state become significant) see postulates p399 text |
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Name |
Definition |
Explanation or Alternative Definition (don't use on
a test) |
Objective Link |
Define |
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electrical field |
5.1.9 |
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electric potential energy difference between two points
in an electric field |
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electrical potential - |
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11.1.1 |
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electrical potential difference |
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electronvolt |
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electric current |
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resistance |
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electromotive force |
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the magnitude of the magnetic field strength B |
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ampere |
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magnetic flux |
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magnetic flux linkage |
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State |
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there are two types of electric charge |
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concept of conservation of charge |
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Coulomb's law |
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Ohm's law |
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the definition of the ampere |
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State and apply the formula relating electric field
strength to potential gradient |
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Faraday's law |
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Lenz's law |
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Name |
Definition |
Explanation or Alternative Definition (don't use on
a test) |
Objective Link |
Define |
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State |
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Name |
Definition |
Explanation or Alternative Definition (don't use on
a test) |
Objective Link |
Define |
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State |
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