# Shared Flashcard Set

## Details

IB Physics SL Topic 3
Assessment Statements
10
Physics
05/10/2011

Term
 3.1.1 State that temperature determinesthe direction of thermal energy transfer between two objects.
Definition
 Thermal energy will flow towards the cooler object, since it always attempts to reach thermal equilibrium, meaning thermal energy tends to spread.
Term
 3.1.2 State the relation between the Kelvin and Celsius scales of temperature.
Definition
 T/K = t/°C + 273 is sufficient.
Term
 3.1.3 State that the internal energy of a substance is the total potential energy and random kinetic energy of the molecules of the substance.
Definition
 Students should know that the kinetic energy of the molecules arises from their random/translational/rotational motion and that the potential energy of the molecules arises from the forces between the molecules.
Term
 3.1.5 Define the mole and molar mass.
Definition
 SI-unit for amount of substance. One mole contains the same number of atoms as 0.012kg of carbon-12.Molar mass: the mass of one mole of a substance.
Term
Definition
 The number of atoms in 0.012kg of carbon-12.
Term
 3.2.1 Define specific heat capacity andthermal capacity.
Definition
 thermal (C): the energy required to raise the temperature of an object by one K.specific (c): the energy required to raise the temperature of a unit mass of a substance by one K
Term
 3.2.7 Define specific latent heat.
Definition
 the amount of energy released or acquired per unit mass during phase change.
Term
 3.2.9 Define pressure.
Definition
 force exerted per unit area. A result of collisions between the molecules of a gas and its container.
Term
 3.2.10 State the assumptions of the kinetic model of an ideal gas.
Definition
 - Newton’s laws apply to molecular behaviour- no intermolecular forces- molecules are treated as points- the molecules are in random motion- collisions between molecules are elastic- no time is spent in the collisions
Term
 3.2.11 State that temperature is a measure of the average random kinetic energy of the molecules of an ideal gas.
Definition
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