Unit 6- Heat And Light Flashcards
Definition of energy
Energy is the ability to do work or produce heat
What is kinetic energy
The energy of motion
What is potential energy
Potential energy is stored energy or unused energy
Definition of heat
Heat is energy that is transferred from one object to another because of a difference in their temperatures
What is a joule
A joule is approximately how much energy is needed to bring a cheeseburger to your mouth
Definition of temperature
Temperature is a measure of the average kinetic energy of the molecules of a substance.
What is celsius
A unit of measurement
K= -273.150°C
What is a kelvin
A kelvin is a way to describe temperature
°C + 273.15 K
What is absolute Zero
Absolute zero is the lowest possible temperature theoretically possible for any substance, it is so cold that atoms and molecules no longer move. It is equal to 0 K or -273.15°C.
What is the first law of thermodynamics?
Energy can be changed from one to another but cannot be created nor destroyed
What is exothermic
Exothermic is when heat is being released
What is endothermic
Endothermic is when heat is being absorbed
Definition of calorimetry
Calorimetry is the branch of thermochemistry concerned with measurement and heat change
Specific heat definition
The specific heat of a substance is the amount of heat energy required to raise the temperature of one gram of a substance by one Celsius degree or one kelvin
Molar heat solution definition
The molar heat of a substance is the heat absorbed or released when one mole of the substance is dissolved in water.
(🔺Hsoln)
Latent heat definition
Latent heat is what is required for a phase change to occur
Heat of fusion definition
the quantity of heat necessary to change 1 g of a solid to a liquid with no temperature change
Definition of heat of evaporation
Heat evaporation is the amount of energy that must be added to a liquid substance to transform a quantity of that substance into a gas.
What is specular reflection
Specular reflection is a type of surface reflectance often described as a mirror-like reflection of light from the surface.
What is diffuse reflection
Diffuse reflection is the reflection of light or other waves or particles from a surface such that a ray incident on the surface is scattered at many angles rather than at just one angle as in the case of specular reflection.
Heat of vaporization definition
What is diffuse reflection?
Diffuse reflection is the reflection of light or other waves or particles from a surface such that a ray incident on the surface is scattered at many angles rather than at just one angle as in the case of specular reflection.
How to change K to C°
Subtract 273.15 from original unit
How to change C° to K
Add 273.15 to the original unit
