100+ Energy kj PowerPoint (PPT) Presentations, Energy kj PPTs

Energy kj - PowerPoint PPT Presentation

Energy in food

Energy in food. Energy is measured in joules . One joule is the energy needed to lift a weight of one newton through one metre. A small apple has a weight of about 1 N. How many apples would you need to lift through one metre to use up all the energy in this chocolate bar?. Energy (kJ) 1075

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686 views • 34 slides

Starter: In the back of your book . . .

Starter: In the back of your book. List 5 chemical changes. List 4 physical changes. List 3 exothermic reactions. List 2 endothermic reactions. List one way that you can tell a reaction is exothermic. Objectives. To develop scientific vocabulary.

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321 views • 16 slides

Energy in Chemical Changes

Energy in Chemical Changes. Chemical change-new substance is formed. starting substances ? new substances or reactants ? products. Virtually every chemical reaction is accompanied by absorption or release of energy.

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227 views • 11 slides

Enthalpy of Chemical Reactions

Enthalpy of Chemical Reactions. CHEMISTRY 11 Feb. 16, 2010. Chemical Bonds. A molecule is composed of atoms held together by chemical bonds For a chemical reaction to occur, bonds must be broken, and new chemical bonds must form

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322 views • 11 slides

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Energy in food

Starter: In the back of your book . . .

Energy in Chemical Changes

Enthalpy of Chemical Reactions