Temperature, Energy, and Heat
What is Kinetic Energy?
Moving energy
What is the name for the transfer of heat by direct contact?
Conduction
What is activation energy?
The energy required to break the bonds in the reactants for a chemical reaction to occur.
What are the 3 phases of matter?
Solid, Liquid, and Gas
What is temperature?
The measurement of the average energy per molecule.
What is Potential Energy?
Stored energy. Chemical energy stored in bonds OR heat absorbed or released during a reaction.
Good conductors make good insulators, true or false?
False, bad conductors make good insulators.
In a exothermic reaction, is energy entering or leaving the system?
Leaving.
What is condensation?
A phase change to liquid from gas at a temperature below the boiling point.
What is heat?
The total energy in a collection of molecules.
Temperature is measured in what 3 units?
Celsius, Fahrenheit, and Kelvin.
What is convection?
The transfer of heat through the movement of fluids.
What type of reaction is the formation of Ice?
Exothermic
Changing phases from solid to liquid to gas is what kind of reaction?
Endothermic
What is the SI unit for measuring Energy?
Joules
What is the first law of thermodynamics?
Energy can be neither created nor destroyed.
What is the second law of thermodynamics?
Energy (heat) spontaneously flows from higher temperature to lower temperature.
In a endothermic reaction, how is the energy being used?
In an endothermic reaction energy is used, consumed, and stored.
How can we move from solid to liquid, and from liquid to gas?
By overcoming the intermolecular forces.
In the equation E=mc(T2-T1) what does c represent?
The specific heat of the material being observed.
If you mix 100g of 100C water with 100g of 800C water, what will the be the mass and temperature of the resulting mixture?
200g of 450C water
What is the only usable method of heat transfer in space?
Radiation
The formation of morning dew is __________ and is therefore a ____thermic reaction.
Condensation, exothermic
The process by which a solid turns directly into a gas and skips the liquid phase is called?
Sublimation
Define specific heat.
Specific heat is the amount of heat per unit mass required to raise the temperature by one degree Celsius.