Parameter Amount Units Ref MOuter Core 4.63E+20 kg 2.B18 ρOuter Core Current 5000 kg/m3 2.B10 vOuter Core Current = 1/ρOCC 2.00E-04 m3/kg VOuter Core Initial 9.02E+16 m3 2.F9,B15 ρOuter Core Initial = MOC/VOCI 5134 kg/m3 vOuter Core Initial = 1/ρOCI 1.95E-04 m3/kg ∆vOuter Core = vMC – vMI 5.20E-06 m3/kg ∆vFusion 6.70E-08 m3/mol 4 AFe 5.58E-02 kg/mol 5 ∆vFusion = ∆vF/AFe 1.20E-06 m3/kg ∆vFusion/vOuter Core Current 0.60% m3/kg ∆vTemperature = ∆vOC – ∆vF 4.00E-06 m3/kg βOuter Core 1.50E-05 m3m–3K –1 6 ∆TOuter Core = ∆vOC/(βOCvOC) 1352 K TOuter Core Current 1650 K 8 TOuter Core Initial = TOCC – ∆TOC 298 K Goal ∆hFusion 5.00E+05 J/kg 7 ∆HFusion 2.32E+26 J COuter Core 46 Jmol –1K –1 COuter Core = COC/AFe 824 Jkg –1K –1 ∆HTemperature = COC∆TOCMOC 5.16E+26 J ∆HOuter Core Overall = ∆HT + ∆HF 7.47E+26 J Table 2 - Outer Core Expansion STERNBERG Craters and cracks 2023 ICC 42
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