CH 2 SEC 3 ENERGY AND MATTER

ENERGY ENERGY- IS THE ABILITY TO DO WORK OR CAUSE CHANGE. KEY- EVERY CHEMICAL OR PHYSICAL CHANGE IN MATTER INCLUDES A CHANGE IN ENERGY. KEY- LIKE MATTER ENERGY IS NEITHER CREATED OR DESTROYED IN CHEMICAL REACTIONS, BUT CAN CHANGE FROM ONE FORM TO ANOTHER!

ENERGY AND MATTER EXAMPLE- WHEN CHARCOAL BURNS IT RELEASES ENERGY IN THE FORM OF HEAT AND LIGHT. KEY- FORMS OF ENERGY RELATED TO CHANGES IN MATTER INCLUDE; THERMAL ENERGY, CHEMICAL ENERGY, ELECTROMAGNETIC ENERGY, AND ELECTRICAL ENERGY.

TEMP AND THERMAL ENERGY TEMPERATURE- IS A MEASURE OF THE AVERAGE ENERGY OF RANDOM MOTION OF PARTICLES OF MATTER THERMAL ENERGY- IS THE TOTAL ENERGY OF ALL THE PARTICLES IN AN OBJECT. EX- HOT CUP OF COFFEE RELEASING T. E. THERMAL ENERGY- ALWAYS FLOWS FROM WARMER MATTER TO COOLER MATTER

COPY TO NOTES

CH 2 SEC 3 PART 2

FORMS OF ENERGY KEY- WHEN MATTER CHANGES THE MOST COMMON FORM OF ENERGY RELEASED OR ABSORBED IS THERMAL ENERGY FOR EXAMPLE- ICE ABSORBS THERMAL ENERGY FROM ITS SURROUNDINGS WHEN IT MELTS. THAT’S WHY YOU CAN PACK A COOLER FULL OF ICE AND FOOD AND KEEP IT COLD.

TIP OF THE ICEBERG!

FORMS OF ENERGY ENDOTHERMIC CHANGE- IS WHEN ENERGY IS TAKEN IN. EXAMPLE- ICE MELTING

EXOTHERMIC CHANGE- WHEN ENERGY IS GIVEN OFF EXAMPLE- WARMING YOUR HANDS OVER A FIRE

CHEMICAL ENERGY CHEMICAL ENERGY- IS STORED IN THE CHEMICAL BONDS BETWEEN ATOMS EXAMPLE- IT IS STORED IN THE FOODS YOU EAT, IN GASOLINE USED AND EVEN IN THE CELLS OF YOUR BODY

KEY- WHEN CHEMICAL CHANGE OCCURS, CHEMICAL BONDS ARE BROKEN AND NEW BONDS ARE FORMED EXAMPLE- WHEN A MATCH BURNS, SOME OF THE CHEMICAL ENERGY CONTAINED IN THE COMPOUNDS OF THE MATCH IS TRANSFORMED INTO THERMAL ENERGY GIVING OFF HEAT AND LIGHT

CHEMICAL CHANGE – some thing new is created!