Energy Revision Flashcards
(26 cards)
Is Kinetic energy active or potential
Active
Is Electrical energy active or potential
Active
Is Heat energy active or potential
Active
Is Light energy active or potential
Active
Is Sound energy active or potential
Active
Is Nuclear energy active or potential
Potential
Is Gravitational energy active or potential
Potential
Is Elastic energy active or potential
Potential
Is Chemical energy active or potential
Potential
How to Calculate efficiency
Measure of the useful energy released during an energy change
distinguish between the terms heat energy and temperature
Heat is the total energy of the motion of the molecules of a substance, whereas temperature refers to the measure of the average energy of the motions of the molecules in the substance
what are the factors that affect the quantity of heat energy in a substance
the amount of the heat needed, is the mass of the substance, is the specific heat capacity of the substance and is the difference in the temperature of a substance.
what is the state of matter of a substance from a heating curve
A heating curve of a substance shows the relationship of temperature, state of matter, and heat when added over time
Describe the movement of particles during changes of state
their closeness, arrangement or motion change
Describe the energy of particles during changes of state
As heat energy is added, the particles gain more heat energy until they undergo the process of changing state, at which point their temperature remains constant
Describe the arrangement of particles during changes of state
The particles in solids vibrate about fixed positions; even at very low temperatures. Individual particles in liquids and gases have no fixed positions and move chaotically
Define the term diffusion
the random movement of particles that causes them to spread out and mix.
what is a common experiment that can be used to show diffusion using ammonia
Cotton balls soaked in concentrated solutions of ammonia and hydrochloric acid are introduced into opposite ends of a glass tube
how does temperature affect affect the rate of diffusion
at higher temperatures, the rate at which fluid particles will diffuse is faster than at lower temperatures.
how does particle size affect diffusion
Particles with a smaller hydrodynamic radius have larger diffusion constant but weaker interaction with the sphere
recall the three types of heat transfer
radiation.conduction.convection.
where is conduction most common
solids and liquids
where is radiation most common
Naturally occurring radioactive minerals in the ground, soil
where is convection most common
Boiling Water
