Iron is the most important element in the Earth's core, the inner core is solid, the...

Transcribed Image Text:

Iron is the most important element in the Earth's core, the inner core is solid, the outer core is liquid. The magnetic field is generated by electric currents due to the motion of convection currents of molten iron in the outer core. Earth's magnetic field is crucial to life on our planet. If outer core would be solid it dramatically changes the Earth environment. The melting of Fe under very high pressures is active area of theoretical and experimental research. Calculate the following properties of 8-Fe: 1. Entropy change on fusion (in cal/K-mol) at normal pressure and compare it with Richard's rule. 2. Find slope (dT:(P)/dT) of the melting temperature dependence on pressure at normal pressure. 3. Find melting temperature of iron in the outer core at pressure 300 GPa, if the slope (dT(P)/dT) does not depend on pressure 4. Compare this estimated melting temperature at 300 GPa with the temperature of the liquid outer core being in the range 4,500 5,500 C. 5. Interpret the difference between estimated melting temperature at 300 GPa and the fact that the outer core at temperatures in the range 4,500 5,500 C is liquid. Iron is the most important element in the Earth's core, the inner core is solid, the outer core is liquid. The magnetic field is generated by electric currents due to the motion of convection currents of molten iron in the outer core. Earth's magnetic field is crucial to life on our planet. If outer core would be solid it dramatically changes the Earth environment. The melting of Fe under very high pressures is active area of theoretical and experimental research. Calculate the following properties of 8-Fe: 1. Entropy change on fusion (in cal/K-mol) at normal pressure and compare it with Richard's rule. 2. Find slope (dT:(P)/dT) of the melting temperature dependence on pressure at normal pressure. 3. Find melting temperature of iron in the outer core at pressure 300 GPa, if the slope (dT(P)/dT) does not depend on pressure 4. Compare this estimated melting temperature at 300 GPa with the temperature of the liquid outer core being in the range 4,500 5,500 C. 5. Interpret the difference between estimated melting temperature at 300 GPa and the fact that the outer core at temperatures in the range 4,500 5,500 C is liquid.

Answer rating: 100% (QA)

1 The entropy change on fusion of iron Fe may be calculated using the formulation Sfus Hfus Tfus whe... View the full answer