The organic molecules in living things undergo chemical reactions. ADP ATP Energy ADP  ATP Energy O O O BURNING GLUCOSE A chemical reaction is a process that changes one set of chemicals into another set of chemicals. The coke/mentos explosion is a type of chemical reaction.

Another chemical reaction: Chemical Reactions Photosynthesis Energy CO2 O2 A chemical reaction is a process that changes one set of chemicals into another set of chemicals. The coke/mentos explosion is a type of chemical reaction. H2O

Chemical Reaction A chemical reaction is a process that changes one set of chemicals into another set of chemicals. The coke/mentos explosion is a type of chemical reaction. Process that transforms one set of chemicals into another. Ex: burning glucose and photosynthesis.

Living things depend on chemical reactions to obtain energy. A chemical reaction is a process that changes one set of chemicals into another set of chemicals. The coke/mentos explosion is a type of chemical reaction.

In the reaction below, glucose and oxygen are the reactants. Chemical Reactions ADP ATP O ADP  ATP O O A chemical reaction is a process that changes one set of chemicals into another set of chemicals. The coke/mentos explosion is a type of chemical reaction.

Reactants Chemicals that are present at the start of a reaction. O O O Chemical Reactions ADP ATP O ADP  ATP O O A chemical reaction is a process that changes one set of chemicals into another set of chemicals. The coke/mentos explosion is a type of chemical reaction. Chemicals that are present at the start of a reaction.

Reactants are transformed into products. Chemical Reactions ADP ATP ADP  ATP O O O A chemical reaction is a process that changes one set of chemicals into another set of chemicals. The coke/mentos explosion is a type of chemical reaction.

Products Chemicals that are present at the end of a reaction. O O O Chemical Reactions ADP ATP ADP ATP Energy ADP  ATP Energy O O O A chemical reaction is a process that changes one set of chemicals into another set of chemicals. The coke/mentos explosion is a type of chemical reaction. Chemicals that are present at the end of a reaction.

Burning glucose: C6H12O6 O2 + H2O CO2 + Energy Released Chemical Reactions C6H12O6 O2 + H2O CO2 + Energy Released A chemical reaction is a process that changes one set of chemicals into another set of chemicals. The coke/mentos explosion is a type of chemical reaction.

Label the reactants and products. Burning glucose: Chemical Reactions C6H12O6 O2 + H2O CO2 + Reactants Energy Released Products A chemical reaction is a process that changes one set of chemicals into another set of chemicals. The coke/mentos explosion is a type of chemical reaction.

Photosynthesis: Chemical Reactions A chemical reaction is a process that changes one set of chemicals into another set of chemicals. The coke/mentos explosion is a type of chemical reaction.

Use the diagram below to write out the photosynthesis reaction. Chemical Reactions Energy CO2 O2 A chemical reaction is a process that changes one set of chemicals into another set of chemicals. The coke/mentos explosion is a type of chemical reaction. H2O

Photosynthesis: CO2 H2O + C6H12O6 O2 + Energy Absorbed Chemical Reactions Energy Absorbed CO2 H2O + C6H12O6 O2 + A chemical reaction is a process that changes one set of chemicals into another set of chemicals. The coke/mentos explosion is a type of chemical reaction.

Photosynthesis: CO2 H2O + C6H12O6 O2 + Energy Absorbed Reactants Chemical Reactions Energy Absorbed CO2 H2O + C6H12O6 O2 + Reactants Products A chemical reaction is a process that changes one set of chemicals into another set of chemicals. The coke/mentos explosion is a type of chemical reaction.

The animation below shows iron rusting The animation below shows iron rusting. What are the reactants and product? Chemical Reactions Fe + O Fe2O 2 Reactants Product Fe Fe Fe Fe O Fe Fe Fe Fe Some chemical reactions occur slowly, such as the combination of iron and oxygen to form rust (iron oxide). This reaction can take years to complete. Fe Fe Fe Fe Fe Fe Fe Fe

Bonds always change during chemical reactions (old bonds break and new bonds form). ADP  ATP O O O Some chemical reactions occur slowly, such as the combination of iron and oxygen to form rust (iron oxide). This reaction can take years to complete.

Copyright Pearson Prentice Hall Since bonds are made from energy, a change in bonds = a change in energy. Chemical Reactions Other reactions occur quickly. For example, when something is burned, the reaction is rapid and sometimes explosive. LIGHT CANDLE. But what exactly does it mean to “burn” something? Like rusting, burning means combining material with oxygen. When I burn the candle, I am combining it with oxygen. PLACE GLASS OVER CANDLE. This is why a flame will go out if it doesn’t get any air – it needs oxygen to burn. However, unlike rusting, when something is burned, it reacts with oxygen very rapidly. Burning also happens in our bodies. We eat food and breath in oxygen. We burn the food by combining it with oxygen . But how is the burning reaction in our bodies different from burning a candle? Our bodies can control the rate of the reaction so that we don’t burn up our food all at once. Instead, we burn it slowly. Our 98.6 degree body heat is a result of this slow burn. Copyright Pearson Prentice Hall

Copyright Pearson Prentice Hall Energy is either released or absorbed during chemical reactions. Chemical Reactions Other reactions occur quickly. For example, when something is burned, the reaction is rapid and sometimes explosive. LIGHT CANDLE. But what exactly does it mean to “burn” something? Like rusting, burning means combining material with oxygen. When I burn the candle, I am combining it with oxygen. PLACE GLASS OVER CANDLE. This is why a flame will go out if it doesn’t get any air – it needs oxygen to burn. However, unlike rusting, when something is burned, it reacts with oxygen very rapidly. Burning also happens in our bodies. We eat food and breath in oxygen. We burn the food by combining it with oxygen . But how is the burning reaction in our bodies different from burning a candle? Our bodies can control the rate of the reaction so that we don’t burn up our food all at once. Instead, we burn it slowly. Our 98.6 degree body heat is a result of this slow burn. Energy released Energy absorbed Copyright Pearson Prentice Hall

Exothermic OUT A chemical reaction is a process that changes one set of chemicals into another set of chemicals. The coke/mentos explosion is a type of chemical reaction. Chemical reaction that releases energy. Ex: burning glucose.

Endothermic Chemical reaction that absorbs energy. Ex: photosynthesis. IN A chemical reaction is a process that changes one set of chemicals into another set of chemicals. The coke/mentos explosion is a type of chemical reaction. Chemical reaction that absorbs energy. Ex: photosynthesis.

Copyright Pearson Prentice Hall Write in notes: Chemical Reactions Chemical Reactions Energy absorbed Energy released Exothermic Endothermic Other reactions occur quickly. For example, when something is burned, the reaction is rapid and sometimes explosive. LIGHT CANDLE. But what exactly does it mean to “burn” something? Like rusting, burning means combining material with oxygen. When I burn the candle, I am combining it with oxygen. PLACE GLASS OVER CANDLE. This is why a flame will go out if it doesn’t get any air – it needs oxygen to burn. However, unlike rusting, when something is burned, it reacts with oxygen very rapidly. Burning also happens in our bodies. We eat food and breath in oxygen. We burn the food by combining it with oxygen . But how is the burning reaction in our bodies different from burning a candle? Our bodies can control the rate of the reaction so that we don’t burn up our food all at once. Instead, we burn it slowly. Our 98.6 degree body heat is a result of this slow burn. Copyright Pearson Prentice Hall

Since living things require energy to live, most of the reactions that take place in our bodies are exothermic. Chemical Reactions Other reactions occur quickly. For example, when something is burned, the reaction is rapid and sometimes explosive. LIGHT CANDLE. But what exactly does it mean to “burn” something? Like rusting, burning means combining material with oxygen. When I burn the candle, I am combining it with oxygen. PLACE GLASS OVER CANDLE. This is why a flame will go out if it doesn’t get any air – it needs oxygen to burn. However, unlike rusting, when something is burned, it reacts with oxygen very rapidly. Burning also happens in our bodies. We eat food and breath in oxygen. We burn the food by combining it with oxygen . But how is the burning reaction in our bodies different from burning a candle? Our bodies can control the rate of the reaction so that we don’t burn up our food all at once. Instead, we burn it slowly. Our 98.6 degree body heat is a result of this slow burn.

(More common in living things) ds Chemical Reactions Chemical Reactions Energy absorbed Energy released Exothermic Endothermic (More common in living things) Other reactions occur quickly. For example, when something is burned, the reaction is rapid and sometimes explosive. LIGHT CANDLE. But what exactly does it mean to “burn” something? Like rusting, burning means combining material with oxygen. When I burn the candle, I am combining it with oxygen. PLACE GLASS OVER CANDLE. This is why a flame will go out if it doesn’t get any air – it needs oxygen to burn. However, unlike rusting, when something is burned, it reacts with oxygen very rapidly. Burning also happens in our bodies. We eat food and breath in oxygen. We burn the food by combining it with oxygen . But how is the burning reaction in our bodies different from burning a candle? Our bodies can control the rate of the reaction so that we don’t burn up our food all at once. Instead, we burn it slowly. Our 98.6 degree body heat is a result of this slow burn. Copyright Pearson Prentice Hall

(More common in living things) Draw in notes: Chemical Reactions Chemical Reactions Energy absorbed Energy released Exothermic Endothermic (More common in living things) Photosynthesis Other reactions occur quickly. For example, when something is burned, the reaction is rapid and sometimes explosive. LIGHT CANDLE. But what exactly does it mean to “burn” something? Like rusting, burning means combining material with oxygen. When I burn the candle, I am combining it with oxygen. PLACE GLASS OVER CANDLE. This is why a flame will go out if it doesn’t get any air – it needs oxygen to burn. However, unlike rusting, when something is burned, it reacts with oxygen very rapidly. Burning also happens in our bodies. We eat food and breath in oxygen. We burn the food by combining it with oxygen . But how is the burning reaction in our bodies different from burning a candle? Our bodies can control the rate of the reaction so that we don’t burn up our food all at once. Instead, we burn it slowly. Our 98.6 degree body heat is a result of this slow burn. Burning glucose Copyright Pearson Prentice Hall