4. The dependence of the true atomic heat capacity of metallic niobium on temperature is expressed by the equation
Ср0=23.18 3.186*10-3 T J/(mol*K)
in the temperature range of 273-1573 K. Obtain an equation for the dependence of the enthalpy of niobium on temperature. Calculate the change in enthalpy, H1573-H273 for 1 mole of niobium.

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