Thermal Energy & Matter Flashcards
(40 cards)
Thermal energy depends on what?
Mass
The transfer of thermal energy from one object to another because of a temperature difference
Heat
Is related to the average kinetic energy of the particles in an object due to their random motion through space.
Temperature
Q=(m)(c)(ΔT); What does ‘m’ stand for?
Mass
Q=(m)(c)(ΔT); What does ‘Q’ stand for?
Heat gained or lost
Q=(m)(c)(ΔT); What does ‘c’ stand for?
Specific Heat
Q=(m)(c)(ΔT); What does ‘ΔT’ stand for?
Change in Temperature; The triangle stands for ‘delta’
The amount of heat needed to raise the temperature of one gram of a material by one degree Celsius
Specific heat
An increase in the volume of a material due to a temperature increase
Thermal expansion
On the Kelvin scale,______________ is defined as temperature of 0 kelvins.
Absolute Zero
The total potential & kinetic energy of all the particles in an object.
Thermal energy
Heat flows spontaneously from _____ to ______
objects
Hot; Cold
Thermal energy depends on the _____, _________, ________.
Mass, temperature & phase (solid, liquid, gas)
Thermal expansion occurs because?
Particles of matter tend to move farther apart as temperature increases.
The ________ a materials specific heat, the more it’s ___________ increases when heat is absorbed.
Lower; Temperature
Iron has a _________ specific heat.
Lower
From his observations of cannon drilling, _____________ concluded that heat could not be a form of matter.
Count Rumford
What property of an object is related to the average kinetic energy in the particles in that object?
Temperature
A thermometer works based on property of…?
Thermal expansion
What does a calorimeter directly measure?
Change in temperature
______________ in gases is slower than in liquids & solids because the particles in a gas collide less often.
Conduction
Three convection currents are very natural such as _____________, ____________& _____________ of hot rock in Earth’s interior.
Ocean currents, weather systems & movements
As an objects temperature increases, the rate at which it radiates energy ___________.
Increases
Does metal have a higher or lower specific heat than plastic
Lower
