Energy transfer by heating

Question 1

Internal energy

Answer 1

The total energy stored by the particles making a substance or system

Question 2

What is temperature?

Answer 2

The average internal energy of a substance

Question 3

Specific heat capacity

Answer 3

The amount of energy need to raise the temp of 1kg of a substance by 1C

Question 4

conduction

Answer 4

vibrating particles transfers energy to neighbouring particles

Question 5

What happens to the particles of a soild when heated

Answer 5

1. The end of the solid is heated and the energy
   is transferred to its kenetic energy store of
   the particles at that end
2. This causes the particles to vibrate faster
3. so they collide with neighboring particles
   more often with more energy
4. This process is repeated until energy is
   passed along the solid until the end where
   the heat is spread out evenly

Question 6

convection

Answer 6

Where energetic particles move away from hotter to cooler regions

Question 7

What will the particles be like at the warmer regions?

Answer 7

• More spread out
• Expands = less dense

Question 8

Thermal conductivity

Answer 8

How well objects transfer energy by conduction

Question 9

Where state does conduction usually take in?

Answer 9

Solids

Question 10

What state does convection usually take in?

Answer 10

liquids and gases

Question 11

Convection current

Answer 11

• The air heated become less dense and
  rises
• the cool air then replaces the warm air
  which then gets heated again
• at the same time the warm air that
  rose transfer energy to it’s
  surroundings and becomes cool air
  again
• this then repeats