Unit 6 Flashcards
What is the difference between chemical and physical change
Physical change can be reversed
Chemical change cannot
What is the difference between dissolving and reacting
Dissolving is a physical change
Reacting is a chemical change
What is it called when a solid changes directly into a gas
Sublimation
How do molecules change as they get heated up
They move faster and farther apart
What makes water an exception to the phase change rule
It expands when it changes into a solid
Can metals exist is solid, liquid, and gas phases
Yes
What makes a chemical equation balanced
The same number of elements on each side
What law requires chemical reactions to have a balanced equation
Law of mass conservation
What is the difference method
A way to measure mass by weighing some mass in a container then subtract the mass of the container
