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.
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