what is the change in enthalpy of pure iron when it is heated from 25°C to 700°C
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It depends upon the Cp value of iron at different temperatures. as ∆H = integral(Cpdt) this is generalised equation to calculate Enthalpy change. Since there is no phase transformation occuring in given range of temperature, so Cp can be assumed to be constant throughout for calculation.
It depends upon the Cp value of iron at different temperatures.
as ∆H = integral(Cpdt) this is generalised equation to calculate Enthalpy change.
Since there is no phase transformation occuring in given range of temperature, so Cp can be assumed to be constant throughout for calculation.
See lessHeating the iron change of Crystal structure and formation of phase transformation occur.
Heating the iron change of Crystal structure and formation of phase transformation occur.
See less