System & Surroundings
This is the part of the universe we focus on when studying energy transfer.
System
what is energy
ability to do work or produce heat
Heat flows in which direction until thermal equilibrium is reached.
Hot to Cold (less hot)
In the balloon lab, the white powder and clear liquid formed this. (element, compound, or mixture)
mixture
give an example of matter and an example of energy
water, heat
Everything outside the system is called this.
The total kinetic energy of a substance is called this.
Thermal Energy
The average speed of particles in a substance
Temperature
The chemical formula H₂O identifies this as a compound, element, or mixture?
compound
This law states that energy can change forms but cannot be created or destroyed.
Law of conservation of energy
In a certain reaction, the system is vinegar and baking soda. What is the surroundings?
Person's hand, container, air, table
This is the energy of motion.
Kinetic Energy
Heated water circulating in a pot is an example of this type of heat transfer.
convection
If energy is absorbed in a reaction, it is called this type of process.
Endothermic
Sand heats up faster than ocean water because its specific heat is (higher or lower)
lower
Energy cannot be transferred in this type of system.
Isolated
This type of energy is stored.
Potential Energy
A cup of tea at 100℃ and a pool at 15℃. which has more thermal energy.
pool
you mix 2 liquids, what is it called when the temperatures stop changing
thermal equilibrium
Why does a metal handrail feels cooler than a plastic chair
it conducts heat away from your hand
True or False: Energy and mass are always conserved.
True
what is another word for the sum of all the kinetic energy of an object's particles?
thermal energy
Thermal energy transfer can occur by conduction, convection, or this process.
Radiation
if you touch the flask for an endothermic reaction, what will it feel like, and why?
cold, because it is absorbing heat from your hand
If you mix water (insulator) with another liquid that is a conductor, will the temperature end up right in the middle or closer to one of the liquid's starting temperature?
closer to water's starting temperature because it is an insulator (high specific heat) so it resists temperature change