Archive for the ‘ Obj 5-Chem Reactions ’ Category

Obj 5-Concept & Energy Requirement of Chem Reactions

Chemical Reactions

Picture1A + B = C + D

-the making & breaking of chem bonds,leading to changes in matter composition

-are process in which electrons or group of atoms are taken up into molecules

-activation energy are required ( can be reduced by enzymes)

-divided into 2 types

1)Exergonic reaction  :  net release of free E to surroundings

-chem reactions that release free energy to the surrounding

-Δ G is negative (as it loss energy)

-occur spontaneously

2)Endergonic reaction  :  absorbs free E from surroundings

-chem reaction that absorb free energy from the suurounding

-Δ G is positive (as it gain energy)

-need supplied energy to occur