Vocabulary
how does temperature affect reaction rates?
at the high temperature more partial move faster break down to other reaction
Examples of matter
objects
Identify the reactants in the equation: 2H2+O2→2H2O2
2H2+O2
What is the name of a reaction that releases heat?
exothermic reaction
A mixture where one substance (like a solid) dissolves completely in another (like a liquid), forming a homogeneous mixture.
solution
What is a balanced chemical equation?
the number of atoms of each element is the same on reactant and product
States of Matter
-solid
-liquid
-gas
-plasma
How are reactants affected during a chemical reaction?
The reactants undergo changes, the molecule might join in or separate
During an endothermic reaction, what happens to the temperature of the surroundings?
decreases
Made of one type of material throughout
Substance
How can you identify a chemical change that has occurred?
color change, temperature change, etc.
Properties of Matter
( Name at least three)
What is Color, Texture, Hardness, Flexibility, Size, Shape
Describe the relationship between reactants and products.
Reactants are the starting substances in a chemical reaction, and products are the new substances formed after the reaction.
Burning wood and fireworks are examples of which type of reaction?
exothermic reactions
A characteristic of a substance that can be observed or measured (do not change), such as color, shape, or boiling point
property
Discuss the role of energy in a chemical change.
Energy is needed to break bonds in reactants
Matter is define as
anything that occupy space and has mass
What happens to the energy of reactants in an exothermic reaction?
energy is loss
Why do ice packs feel cold when activated?
they absorb heat from their surroundings because the reaction inside is endothermic