All Flashcards
What happens when a material with high specific heat is heated?
Its temperature increases slowly because it requires a large amount of energy to raise its temperature.
What happens when a material with high thermal conductivity is placed in contact with a heat source?
Heat is rapidly transferred through the material.
What is the effect of increasing the thickness () of a material on the rate of heat transfer?
Increasing the thickness decreases the rate of heat transfer.
What happens if the temperature difference () across a material increases?
The rate of heat transfer through the material increases.
What is the effect of increasing the cross-sectional area () on the rate of heat transfer?
Increasing the cross-sectional area increases the rate of heat transfer.
What are the key differences between specific heat and thermal conductivity?
Specific Heat: How much energy is needed to change temperature. | Thermal Conductivity: How fast heat moves through a material.
Compare materials with high vs. low specific heat.
High Specific Heat: Requires a lot of energy to change temperature, heats up/cools down slowly. | Low Specific Heat: Requires little energy to change temperature, heats up/cools down quickly.
Compare materials with high vs. low thermal conductivity.
High Thermal Conductivity: Transfers heat very quickly. | Low Thermal Conductivity: Slows down heat transfer.
Differentiate between the units of specific heat and thermal conductivity.
Specific Heat: J/kg·°C | Thermal Conductivity: W/m·°C
What is the difference between heat and thermal energy?
Heat: The transfer of energy between objects due to a temperature difference. | Thermal Energy: The total kinetic and potential energy of the molecules within an object.
What are the key differences between specific heat and thermal conductivity?
Specific Heat: How much energy changes temperature. Thermal Conductivity: How fast heat moves.
Compare materials with high vs. low specific heat.
High Specific Heat: Requires much energy to change temperature, heats/cools slowly. Low Specific Heat: Requires little energy to change temperature, heats/cools quickly.
Compare materials with high vs. low thermal conductivity.
High Thermal Conductivity: Transfers heat quickly (e.g., metals). Low Thermal Conductivity: Transfers heat slowly (e.g., insulators).
What is the difference between heat and temperature?
Heat: The total energy of molecular motion in a substance. Temperature: A measure of the average energy of molecular motion in a substance.
Differentiate between conduction and convection heat transfer.
Conduction: Heat transfer through direct contact. Convection: Heat transfer through the movement of fluids.