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## Homework Statement

A typical car gas tank holds 15 gallons

A) Calculate the energy content of this much gasoline

B) Calculate the chemical energy content of 15 gallons of hydrogen gas under normal conditions (12.8 MJ/m^3) and compare with the energy content of gasoline

## Homework Equations

Gasoline produces 70g of CO2 per megajoule of fuel energy

need to qualify hydrogen in terms of energy and CO2 in terms of mass

(3H2 → CO2)

Burning H2 produces .475 aJ= 1.475 aJ of energy.

CO2 has molecular weight of 44 so its mass is (44) (1.66 x 10^-27) = 7.30 x 10^ 26 kg

## The Attempt at a Solution

I have no idea if the above information helps at all, but I really have no idea how to start this problem