16 Questions
Which of the following is a measure of the energy required to produce a unit rise in temperature for one mole of a material?
Heat capacity
How does heat capacity at constant pressure (Cp) usually compare to heat capacity at constant volume (Cv)?
Cp is usually greater than Cv
What is the limiting value of heat capacity for solids?
$3R$
What happens to the heat capacity with increasing temperature for solids?
It increases
What is the Debye temperature typically less than?
Room temperature
What type of energy is stored as atomic vibrations, leading to an increase in heat capacity with temperature?
Phonons
Which type of material generally has a larger specific heat (cp)?
Polymers
What causes polymers to have larger linear coefficient of thermal expansion (α) values?
Strong secondary bonds
Which material has the highest thermal conductivity (k)?
Gold
What type of energy transfer mechanism is responsible for the low thermal conductivity of polymers?
Vibration/rotation of chain molecules
Why do materials experience thermal stresses?
Restrained thermal expansion/contraction
What type of curve represents thermal expansion with an increase in interatomic separation?
Asymmetric curve
Which material has the smallest linear coefficient of thermal expansion (α) value?
Silica (cryst. SiO2)
What is the main reason for the larger specific heat (cp) of polymers compared to metals and ceramics?
Weak secondary bonds
What is the reason for the low thermal conductivity (k) of polymers?
Vibration/rotation of chain molecules
Which type of material generally has a smaller linear coefficient of thermal expansion (α) value?
Metals
Test your understanding of heat capacity and thermal properties of materials with this quiz. Explore how different materials respond to the application of heat and how their thermal properties differ. Learn about heat capacity, thermal expansion, thermal conductivity, and thermal shock resistance.
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