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Homework Help: Electric potential

  1. Jan 29, 2008 #1
    1. The problem statement, all variables and given/known data
    A typical 12.0-V car battery can deliver about 7.56 x 105 C of charge before dying. This is not very much. To get a feel for this, calculate the maximum number of kilograms of water (100 degrees C) that could be boiled into steam (100 degrees C) using energy from this battery.

    2. Relevant equations
    I am not sure how to solve for kilograms. How do I use what I get from solving equation below to calculate how much water could be boiled into steam??

    3. The attempt at a solution
    V= EPE/ q0
  2. jcsd
  3. Jan 29, 2008 #2


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    Homework Helper

    The water is already at 100C, that means that it is already changing phase. If there is not heat losses then all the energy produced by the battery goes into changing the phase of the water.
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