Module 2 Assignment: Part 2

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Make an order of magnitude estimate of the energy (in joule) contained in a quart of soda

1,536,000 Joule

What is the energy density (energy per mass) of butter?

45 MJ/kg

What is the energy density (energy per mass) of gasoline?

45 MJ/kg

What are the roles of a catalyst in the energetics of a chemical reaction?

A catalyst increases the rate of reaction A catalyst is not consumed by the reaction

You are given 12 grams of an unknown substance. How you would accurately determine the precise composition of the unknown substance?

Excite a small portion of it and identify the spectral lines

What happens energetically when chemical bonds are formed?

Forming bonds releases energy

The activation energy of a chemical reaction is the

energy input needed to get the atoms to start sharing their electrons


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