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Questions and Answers
Which of the following is a measure of the energy required to produce a unit rise in temperature for one mole of a material?
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 (correct)
- Thermal conductivity
- Thermal shock resistance
- Thermal expansion
How does heat capacity at constant pressure (Cp) usually compare to heat capacity at constant volume (Cv)?
How does heat capacity at constant pressure (Cp) usually compare to heat capacity at constant volume (Cv)?
- Cp is usually less than Cv
- Cp is equal to Cv
- Cp is usually greater than Cv (correct)
- Cp and Cv are not related to each other
What is the limiting value of heat capacity for solids?
What is the limiting value of heat capacity for solids?
- $2R$
- $5R$
- $3R$ (correct)
- $4R$
What happens to the heat capacity with increasing temperature for solids?
What happens to the heat capacity with increasing temperature for solids?
What is the Debye temperature typically less than?
What is the Debye temperature typically less than?
What type of energy is stored as atomic vibrations, leading to an increase in heat capacity with temperature?
What type of energy is stored as atomic vibrations, leading to an increase in heat capacity with temperature?
Which type of material generally has a larger specific heat (cp)?
Which type of material generally has a larger specific heat (cp)?
What causes polymers to have larger linear coefficient of thermal expansion (α) values?
What causes polymers to have larger linear coefficient of thermal expansion (α) values?
Which material has the highest thermal conductivity (k)?
Which material has the highest thermal conductivity (k)?
What type of energy transfer mechanism is responsible for the low thermal conductivity of polymers?
What type of energy transfer mechanism is responsible for the low thermal conductivity of polymers?
Why do materials experience thermal stresses?
Why do materials experience thermal stresses?
What type of curve represents thermal expansion with an increase in interatomic separation?
What type of curve represents thermal expansion with an increase in interatomic separation?
Which material has the smallest linear coefficient of thermal expansion (α) value?
Which material has the smallest linear coefficient of thermal expansion (α) value?
What is the main reason for the larger specific heat (cp) of polymers compared to metals and ceramics?
What is the main reason for the larger specific heat (cp) of polymers compared to metals and ceramics?
What is the reason for the low thermal conductivity (k) of polymers?
What is the reason for the low thermal conductivity (k) of polymers?
Which type of material generally has a smaller linear coefficient of thermal expansion (α) value?
Which type of material generally has a smaller linear coefficient of thermal expansion (α) value?
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