Chapter 9: Chemical reactions Flashcards
What is a phase change?
Addition or removal of thermal energy, changes states between solid, liquid or gas
What is sublimation?
The phase change of solid to gas
What is deposition?
The phase change between gas to solid
What is a chemical reaction?
When energy breaks apart the bonds
What is the law of conservation of mass?
Mass cannot be created or destroyed
What is conbination?
The reaction of 2 elements to create 1 molecule
What is decomposition?
A molecule breaks down into smaller ones or even atoms
What is exothermic?
Excess energy is released
What is endothermic?
Energy is absorbed
What is Hess’s law?
The enthalpy change of the reaction is equal to the changes in the enthalpy for each step
What is specific heat capacity?
The heat energy in joules, a specific amount of water to increase by 1 degrees Celsius
What is the formula for specific heat capacity?
q = m x c x deltaT
