What is a chemical reaction?

• A change with chemicals

• the result of a chemical change made by different substances

• a process in which some substances change into different substances.

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What is a Physical Change?

• a change in one or more physical properties of matter without any change in chemical properties

• a process in which some substances change into different substances.

• a change made by a physical reactant

What is a Chemical Reaction

• The opposite of a physical reaction, where the result can't eva be change back

• a change in one or more physical properties of matter without any change in chemical properties

• a process in which some substances change into different substances.

What are 2 examples of PHYSICAL Change?

• Cutting Wood

• Burning Wood

• Tearing Metal

• Tearing Paper

What are 2 examples of a CHEMICAL Change?

• Burning Paper

• Ripping a box

• Cooking food

• melting an ice cube

What is a Product?

• an article or substance that is manufactured or refined for sale.

• a substance that takes part in and undergoes change during a reaction.

• C3H8 + 5 O2 → 3 CO2 + 4 H2O

What is a Reactant?

• C3H8 + 5 O2 → 3 CO2 + 4 H2O

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• a substance that takes part in and undergoes change during a reaction.

• an article or substance that is manufactured or refined for sale.

What is the Law of Conservation Mass?

• any system closed to all transfers of matter and energy, the mass of the system must remain constant over time, as system's mass cannot change, so quantity can neither be added nor be removed.

• Define and give examples of a chemical reaction and distinguish between chemical reactions and physical changes. Determine the reactants and products in a chemical equation.

• DONT READ THIS IT WILL WASTE YOUR TIME

• DONT READ THIS IT WILL WASTE YOUR TYME

What is/What happens during an Endothermic Reaction?

• The opposite of an Exothermic reaction

• Energy is released - The thing you would be touching would be cold

• (less) Energy is released - The thing you would be touching would be hot

• Hot WaTeR cOmInG fRoM a fAcUeT

What is/What happens during an Exothermic Reaction

• CoLd waAteRrRr

• Opposite of an Endothermic Reaction

• (less) Energy is released - The thing you would be touching would be hot

• Energy is released - The thing you would be touching would be cold