10.1 Heating,Temperature and Internal Energy

Question 1

What is internal energy?

Answer 1

sum of potential energy contained within the inter atomic bonds and the kinetic energy of the vibrations of the atoms

Question 2

What does potential energy arise from?

Answer 2

energy stored within the inter atomic bonds that are continously stretched and compressed due to vibrations. This means the relative position changes (greater change means greater potential)

Question 3

What doesn’t have an internal energy?

Answer 3

ideal gases

Question 4

What does the kinetic energy depend on?

Answer 4

mass velocity and temperature

Question 5

What is temperature?

Answer 5

can be defined in terms of kinetic energy of vibrating atoms

Question 6

What is special about the distribution of Ek and potential energy (internal energy)

Answer 6

it is random

Question 7

What does greater energy mean>?

Answer 7

greater Ek and hence internal energy

Question 8

What is thermography?

Answer 8

records the temperature of surfaces by detecting long wavelength of infrared radiation.

Question 9

What colour represents the greatest temperature in thermography?

Answer 9

white

Question 10

What colour represents the lowest temperature in thermography?

Answer 10

pink

Question 11

order colours going from greatest to lowest temperature in thermography?

Answer 11

white 
red
yellow 
green 
blue 
pink

Question 12

What is heating?

Answer 12

The process by which energy is transferred by conduction,convection or radiation from a higher to lower temperature,resulting in energy flow from hot to cold.

Question 13

Is kelvin a fundamental unit?

Answer 13

yes, an SI unit