Thermal Properties
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what is the heat capacity
the ability for a material to absorb heat
what are the 2 ways to measure heat capacity
at constant volume at constant pressure
usually, which is greater, Cp or Cv
Cp>Cv
what does heat capacity increase with
temperature
what is the limiting value of the heat capacity
3*R(Gas constant)
How is energy stored
in PHONONS - thermal waves
why do polymers expand more under heat
because theyre bonds are much weaker
what is the definition of thermal conductivity
the ability for a material to transfer heat
atomically, how do atoms transfer heat
the atoms in the hotter region carry heat to those in cooler regions
Put the 3 types of materials in order of Heat capacity
polymers>metals>ceramics
Put the 3 types of materials in order of thermal expansion
polymers>metals>ceramics
Put the 3 types of materials in order of thermal conductivity
metals>ceramics>polymers
how do metals transfer energy
by vibration of atoms and motion of electrons
how do ceramics transfer energy
by vibration of atoms
how do polymers transfer energy
by vibration/rotation of chain molecules
How can thermal stresses be explained
occur due to restrained thermal expansion/contraction
why does thermal shock resistance occur
because of non-uniform heating/cooling