Warm Up

List as many biological processes as you can that involve chemistry.

Chapter 2: Chemistry of Life

Section 2Energy

Pgs 35-36

I. Energy and Matter

i. Energy: the ability to do work

I. Energy and Matter

There are different forms of energy Remember, energy can be converted into different forms

I. Energy and Matter

ii. States of Matter1. Solid

A) Particles closely linked in placeB) Has a fixed volume and shape

2. LiquidA) Particles move more freely over one another

a) Still attracted enough to each other to stay togetherB) Has fixed volume but not a fixed shape

3. GasA) Particles move most rapidly

a) Have little to no attraction for each otherB) Has no fixed volume or shape

I. Energy and Matter

II. Energy and Chemical Reactions

i. Chemical reaction: process which one or more substances change to produce one or more different substances

1. The atoms of the substances rearrange to form something different

a) Lets work with iron (Fe)

iron + oxygen iron oxide

Substances on the left hand side of the

arrow are the reactants

Substances on the right hand side of the arrow are the

products

II. Energy and Chemical Reactions

II. Energy and Chemical Reactions

II. Energy and Chemical Reactions

2. Reversible Reactions

carbon dioxide

water carbonic acid

II. Energy and Chemical Reactions

3. Activation energy: the amount of energy needed to start a reaction

a) Often reactions do not happen spontaneously, they need energy first added to the system

II. Energy and Chemical Reactions

II. Energy and Chemical Reactions

II. Energy and Chemical Reactions

II. Energy and Chemical Reactions4. Catalyst: a substance that enables a

chemical reaction to proceed at a faster rate WITHOUT being changed by the reaction

II. Energy and Chemical Reactions5. Enzyme: a protein that increases the rate of a

chemical reaction WITHOUT being changed by the reaction; an organic catalyst

II. Energy and Chemical Reactions5. Enzyme: a protein that increases the rate of a

chemical reaction WITHOUT being changed by the reaction; an organic catalyst

Enzymatic activity of carbonic anhydrase

Homework

Read Ch 2 Sec 2, pgs 35-36Problem #'s 3, 4, 6 & 7