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10 October, 05:22

An adiabatic closed system is raised 100 m at a location where the gravitational acceleration is 9.8 m/s2. What Is the specific energy change of this system in kJ/kg?

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  1. 10 October, 05:46
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    Answer: 0.98kJ/kg

    Explanation: for a kilogram mass of this system, raising the system at a height h gives it a potential energy of the magnitude gh,

    Where g is gravitational acceleration,

    and h is the height difference.

    This system will have an energy change of

    PE = 100*9.8 = 980 J/kg

    This becomes 980/1000 kJ/kg

    = 0.98kJ/kg
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