請問有誰會這一題嗎?

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  • SC147
    Lv 6
    3 月 前

    Ans : (A) heat

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    Explanation:

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    A state variable is one of the set of variables that describes the mathematical "state" of a dynamical system.The state of a system determines its behaviour in the absence of any external forces. 

    In thermodynamics, a state variable is an independent variable of a state function, like internal energy, eg. temperature, pressure, and volume. 

    PV/T = C (constant) - - - - 《Ideal gas equation 》

    D = M/V

    ∴ pressure(P), volume(V), temperature(T), density(D) - - - "STATE variables".

    "Heat" - - - not a state variable, but a "PROCESS過程 variable".

                 ( ∵"加熱/降溫" 是 "人為"的過程 ) 

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