Heat

Question 1

What is kinetic energy?

Answer 1

Energy in motion

Question 2

What is potential energy?

Answer 2

Energy possessed or stored by an object (in forces)

Question 3

What is thermal energy?

Answer 3

Thermal energy is the sum total of all the kinetic and potential energy of the particles in a substance.

Question 4

What is heat?

Answer 4

Heat is the flow of thermal energy from a substance with higher thermal energy to a region of lower thermal energy

Question 5

What is temperature?

Answer 5

Temperature is the average kinetic energy of the particles of a substance

Question 6

How are kinetic and potential energy related to particles in a substance?

Answer 6

Kinetic energy is how fast the particles are moving

potential energy is the amount of particles in a substance

Question 7

Why do substances not change temperature while they are changing state?

Answer 7

Because the average kinetic energy stays the same when changing states. The new substance absorbs heat and internally rearranges the particles in the substance

Question 8

What is absolute zero? Why is it absolute in terms of thermal energy?

Answer 8

Absolute zero is the lowest possible temperature anything can get. The closest the particles can get and the slowest they move (don’t move at all)
-273.15 degrees Celsius

Question 9

What is kelvin? What does 0 Kelvin equal in degrees Celsius?

Answer 9

A temperature scale that starts at absolute zero so temperatures are only positive.
0 K = -273.15 degrees Celsius

Question 10

How do you convert K to C and vide versa?

Answer 10

K= C + 273.15

Question 11

What is the specific heat capacity?

Answer 11

It is the amount of heat a substance can absorb or release

Question 12

What is the heat of fusion?

Answer 12

The amount of heat needed to transfer to one gram of a substance to MELT or FREEZE it.

Question 13

What is the heat of Vapourization?

Answer 13

The amount of heat you need to transfer to one gram of a substance to BOIL or CONDENSE it.

Question 14

What are the three ways to transfer heat?

Answer 14

Conduction
Convection
Radiation

Question 15

What is conduction? How does it work?

Answer 15

The transferring of heat through direct contact, or flowing through solid substances.
Fast moving got particles collide with slow moving cold particles and speed them up

Question 16

What is convection? How does it work?

Answer 16

The transferring of heat through the movement of hot liquids or gases.
The less dense, hot materials rise carrying the heat with them to cold areas

Question 17

What is radiation? How does it work?

Answer 17

The transferring of heat directly through space as electromagnetic waves.
This is only way heat moves without being carried by matter ( rays)

Question 18

What is a substances thermal conductivity?

Answer 18

It is how quick heat can flow in, out, or through substances.

Question 19

What role does thermal conductivity have in determining if something feels cold or hot to touch?

Answer 19

Substances with a higher thermal conductivity feel colder because they suck the heat out of our hands quicker and heat flows in and out of them quicker