200 300 400 500 100 200 300 400 500 100 200 300 400 500 100 200 300 400 500 100 200 300 400 500 100 P & C Properties P & C Changes Reactions Heat Transfer.

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Presentation transcript:

P & C Properties P & C Changes Reactions Heat Transfer Ionic or Covalent?

Change of state melting, freezing etc… Chemical or Physical

Physical

flammability Chemical or Physical

Chemical

density Chemical or Physical

Physical

reactivity Chemical or Physical

Chemical

solubililty Chemical or Physical

Physical

Sugar dissolves in water. Chemical or physical change?

Physical

In baking biscuits and other quick breads, the baking powder reacts to release carbon dioxide bubbles. The carbon dioxide bubbles cause the dough to rise. Chemical or physical change?

Chemical

Chemical or physical change? A tree rots.

Chemical

Iron rusting or silver tarnishing. Chemical or physical change?

Chemical

Food is chewed and then digested. Chemical or physical change?

Trick question Food chewed = physical change Food digested = chemical change

In the following reaction, what are the reactants? MgCl 2 + Li 2 CO 3  MgCO LiCl

MgCl 2 + Li 2 CO 3

What does the arrow (→) stand for?

Yields

What is the product in the following reaction? 2 C 5 H 5 + Fe  Fe(C 5 H 5 ) 2

Fe(C 5 H 5 ) 2

2 NO 2  2 O 2 + N 2 What type of reaction is the following?

decomposition

True or False In a chemical reaction, the amount of products must equal the amount of reactants.

True Law of conservation of mass.

When an instant ice pack is activated, cold temperatures are produced. Exothermic or Endothermic?

Endothermic

Exothermic or Endothermic? Burning paper.

Exothermic

Exothermic or Endothermic? Sublimation.

Endothermic

In which state of matter do molecules have the most potential energy?

solid

Endothermic or Exothermic? A glow stick is activated.

Exothermic—energy (in the form of light) is released.

In this type of compound, electron are shared by atoms of non-metal elements.

Covalent

In this type of compound, electrons are transferred between atoms of a non-metal and a metal.

Ionic.

Ionic or Covalent? A compound has the following properties: Strong bonds. High melting and boiling points. Brittle. Conducts heat and electricity. Example: NaCl (sodium chloride)

Ionic

Does not conduct electricity. Low melting and boiling points. Tend to be soft and flexible. Example: CO 2 (carbon dioxide) Ionic or Covalent? A compound has the following properties:

Covalent

In a mixture, do the properties of the elements change or stay the same?

Stay the same.