Energy Revision

Question 1

Is Kinetic energy active or potential

Answer 1

Active

Question 2

Is Electrical energy active or potential

Answer 2

Active

Question 3

Is Heat energy active or potential

Answer 3

Active

Question 4

Is Light energy active or potential

Answer 4

Active

Question 5

Is Sound energy active or potential

Answer 5

Active

Question 6

Is Nuclear energy active or potential

Answer 6

Potential

Question 7

Is Gravitational energy active or potential

Answer 7

Potential

Question 8

Is Elastic energy active or potential

Answer 8

Potential

Question 9

Is Chemical energy active or potential

Answer 9

Potential

Question 10

How to Calculate efficiency

Answer 10

Measure of the useful energy released during an energy change

Question 11

distinguish between the terms heat energy and temperature

Answer 11

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

Question 12

what are the factors that affect the quantity of heat energy in a substance

Answer 12

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.

Question 13

what is the state of matter of a substance from a heating curve

Answer 13

A heating curve of a substance shows the relationship of temperature, state of matter, and heat when added over time

Question 14

Describe the movement of particles during changes of state

Answer 14

their closeness, arrangement or motion change

Question 15

Describe the energy of particles during changes of state

Answer 15

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

Question 16

Describe the arrangement of particles during changes of state

Answer 16

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

Question 17

Define the term diffusion

Answer 17

the random movement of particles that causes them to spread out and mix.

Question 18

what is a common experiment that can be used to show diffusion using ammonia

Answer 18

Cotton balls soaked in concentrated solutions of ammonia and hydrochloric acid are introduced into opposite ends of a glass tube

Question 19

how does temperature affect affect the rate of diffusion

Answer 19

at higher temperatures, the rate at which fluid particles will diffuse is faster than at lower temperatures.

Question 20

how does particle size affect diffusion

Answer 20

Particles with a smaller hydrodynamic radius have larger diffusion constant but weaker interaction with the sphere

Question 21

recall the three types of heat transfer

Answer 21

radiation.conduction.convection.

Question 22

where is conduction most common

Answer 22

solids and liquids

Question 23

where is radiation most common

Answer 23

Naturally occurring radioactive minerals in the ground, soil

Question 24

where is convection most common

Answer 24

Boiling Water

Question 25

describe the process of conduction in solids

Answer 25

heat energy is transmitted through collisions between neighboring atoms or molecules

Question 26

what is a common experiment that can be used to measure the rate of conduction

Answer 26

1.Attach a pin to the metal strip using vaseline
2.hold the metal strip with the opposite end in the yellow flame of the bunsen burner
3.time how long it takes for the pin to fall
4.repeat with different materials