Chapter 14 Flashcards
When will thermal energy transfer occur?
Where there is a temperature difference between two points/media
What is the zeroth law of thermodynamics?
If two bodies, A and B are in thermal equilibrium with a 3rd body C, then body A and B are also in thermal equilibrium with each other
What are the two fixed points?
Absolute zero and the triple point
What is absolute zero?
Where the material is zero kelvins
What is the triple point? (of water)
ice, water and water vapour coexists at the same pressures
What is the direction of energy transfer from a hot to cooler object?
The hot to cooler object
Why is the difference between K and degrees celsius negligible at really high temperatures?
It is so large that they are essentially equal
Why when a thermometer is placed in hot water is it not accurate?
When placed, there is a net flow of thermal energy from the water to the thermometer which reduces the temp of the water so the net flow of energy stops when the thermometer and water are at the same temperature.
Why is there no negative kelvin?
As it means there is negative energy which is not possible, energy simply goes to zero
