[學科] 物化兩題 熱力學
suppose that the expansion is reversible but not isothermal and
that the temperature decreases as the expansion proceeds.
a)find an expression for the work when T=Ti-c(V-Vi)
c= const
b)is the work greater or smaller than for isothermal expansion
explore the effect of the temperature dependence of the heat capacity on
the internal energy.
a)the heat capacity of a non-metallic solid at very low temperatures
typically varies aT^3 a=const how does its internal energy vary?
b)suppose that the molar energy of a substance over a limited temperature
range can be expressed as a polynomial in T as U=a+bT^2+cT^3
find an expression for the const volume molar heat capacity at a temperatue T
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