4/22 Flashcards
(20 cards)
Units used to measure energy
Joules (J)
The quantity of heat that raises the temperature of 1g of water by 1 degree Celsius
Calorie
stored energy
potential
energy of motion
kinetic
potential energy stored in chemical bonds
chemical
kinetic energy of atoms’ or molecules’ motion
thermal
Energy cannot be created or destroyed in an ordinary chemical reaction, but the form of energy can change
Law of Conservation of Energy
objects in contact sharing heat
conduction
fluid motion or currents sharing heat
convection
electromagnetic waves sharing heat
radiation
reference state for a substance
standard state
difference in energy that occurs when one mole of a substance is formed from its pure elements
Standard molar enthalpy of formation
“change” or “difference”
Delta 🔺
energy released or absorbed during a chemical reaction
Enthalpy of reaction (🔺H)
heat is released
exothermic
heat is absorbed
endothermic
the amount of heat needed to raise the temperature of one gram of the substance by one degree Celsius
specific heat
joules per gram-degree Celsius
J/g•°C
unit of specific heat
tool used to measure heat of a chemical process
calorimeter
The capacity to do work or produce heat
Energy