J3 Chemical Processes and Chamical Reactions (Chenical change/Reaction)
Studied by 0 people
View linked note
Learn
Practice Test
Spaced Repetition
Match
Flashcards1/7
There's no tags or description
Looks like no tags are added yet.
Name | Mastery | Learn | Test | Matching | Spaced |
|---|
No study sessions yet.
8 Terms
What is a chemical reaction?
A process where substances interact, breaking apart, colliding, and rearranging to form different substances.
What is a physical change?
A change that alters the appearance or form of a substance without changing its chemical composition.
Give examples of physical changes.
Cutting, melting, boiling, and freezing.
What distinguishes a chemical change from a physical change?
A chemical change results in a rearrangement of atoms into different substances with different properties.
What is energy in the context of chemical reactions?
Energy is either gained or released during a chemical change.
What evidence might indicate a chemical change has occurred?
Bubbles (gas formed), precipitate (solid formed), and color change.
What does the Law of Conservation of Matter state?
Matter is neither created nor destroyed; atoms are rearranged in chemical reactions.
Write the equation for the reaction of sodium with chlorine gas.
2Na + Cl2(g) → 2NaCl.