Changes of State Flashcards
What type of change is when a substance changes state?
A physical change.
What happens when a solid is heated?
The particles gain energy.
What happens in a solid when the particles gain energy?
The particles vibrate more.
What happens in a solid when the particles vibrate more?
The forces that hold the solid together are weakened, and the solid expands.
What happens at a certain temperature in a solid?
The particles have enough energy to break free from their positions. This is called melting and the solid turns into a liquid.
What happens when a liquid is heated?
The particles gain energy.
What happens in a liquid when the particles gain energy?
The particles vibrate more.
What happens in a liquid when the particles vibrate more?
The bonds that hold the liquid together are weakened.
What happens at a certain temperature in a liquid?
The particles have enough energy to break their bonds. This is called evaporating and the liquid turns into a gas.
What is the name of the process where a solid turns into a liquid?
Melting
What is the name of the process where a liquid turns into a solid?
Freezing
What is the name of the process where a liquid turns into a gas?
Evaporating
What is the name of the process where a gas turns into a liquid?
Condensing
What is the name of the process where a solid turns into a gas?
Subliming
What are chemical changes?
When bonds between atoms break and the atoms change places.
What is rearranged in a reaction to form the products?
The reactants are rearranged to form the products.
Are chemical changes as easily reversed as physical changes?
No, chemical changes are often very hard to reverse.
