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22 May, 10:29

A cylinder fitted with a piston exists in a high-pressure chamber (3 atm) with an initial volume of 1 L. If a sufficient quantity of a hydrocarbon material is combusted inside the cylinder to produce 1 kJ of energy, and if the volume of the chamber then increases to 1.5 L, what percent of the fuel's energy was lost to friction and heat?

A. 15%

B. 30%

C. 85%

D. 100%

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  1. 22 May, 10:53
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    C. 85%

    Explanation:

    A cylinder fitted with a piston exists in a high-pressure chamber (3 atm) with an initial volume of 1 L. If a sufficient quantity of a hydrocarbon material is combusted inside the cylinder to produce 1 kJ of energy, and if the volume of the chamber then increases to 1.5 L, what percent of the fuel's energy was lost to friction and heat?

    A. 15%

    B. 30%

    C. 85%

    D. 100%

    work done by the system will be

    W=PdV

    p=pressure

    dV=change in volume

    3tam will be changed to N/m^2

    3*1.01*10^5

    W=3.03*10^5 * (1.5-1)

    convert 0.5L to m^3

    5*10^-4

    W=3.03*10^5*5*10^-4

    W=152J

    therefore

    to find the percentage used

    152/1000*100

    15%

    100%-15%

    85% uf the fuel's energy was lost to friction and heat
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