Created by StemPy LabFor the half-reaction , treat the overall enthalpy change as a guide to oxidising power in water. Use these data. Bond dissociation enthalpy: , . Electron gain enthalpy: F , Cl . Hydration enthalpy: , . Which statement is correct?
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← At 298 K, Δ_hydH is -520 kJ mol⁻¹ for Li⁺ and -322 kJ mol⁻¹ for K⁺. Their limiting molar conductivities are 38.7 and 73.5 S cm² mol⁻¹. S1: Li⁺ holds the most water, so its hydrated radius is largest and its mobility lowest. S2: Stokes' law makes hydrated K⁺ about 1.9 times larger than hydrated Li⁺. S3: Lithium metal melts highest in the group because Li⁺ is most strongly hydrated. S4: LiCl still colours a flame crimson, because the flame removes the water and gaseous atoms emit. Which statements are correct?Four period 4 metals have these data, listed as enthalpy of atomisation, melting point, first ionisation enthalpy and metallic radius. Ca: 178 kJ mol⁻¹, 1115 K, 590 kJ mol⁻¹, 197 pm. Cu: 338 kJ mol⁻¹, 1358 K, 745 kJ mol⁻¹, 128 pm. Zn: 131 kJ mol⁻¹, 693 K, 906 kJ mol⁻¹, 134 pm. Ga: 277 kJ mol⁻¹, 303 K, 579 kJ mol⁻¹, 135 pm. Which statement is consistent with these data and with the electronic structures of the atoms? →
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