How Does the Energy Density of a Lead-Acid Battery Compare to Gasoline?

Thread starter aaronb
Start date Apr 7, 2009
Tags

Energy Potential Potential energy

AI Thread Summary

A fully charged 15.0 kg lead-acid battery delivers 1450 W for one hour, equating to a total energy output of 5.22 MJ. When comparing this to gasoline, which has a heat of combustion of approximately 44 MJ/kg, the energy density of the lead-acid battery is significantly lower. The calculated energy density of the battery is about 348 kJ/kg. This stark difference highlights the limitations of lead-acid batteries in terms of energy storage compared to gasoline. Understanding these energy densities is crucial for applications in energy storage and transportation.

Apr 7, 2009

aaronb

Homework Statement

A fully charged 15.0 kg lead-acid battery can deliver power 1450 W for 1.0 hr. (For comparison, the "heat of combustion" of gasoline is about 44 MJ/kg.)

Battery _____ MJ/kg

Homework Equations

Unit conversion problem
1W = 1 J/s

The Attempt at a Solution

(1450 J/s / 15kg) = 96.7/10^6 = 9.6 *10^-5

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Apr 7, 2009

mgb_phys

Science Advisor

Homework Helper

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