A student wants to calculate for the decomposition reaction CaCO_3(s) CaO(s)+CO_2(g)…

CHEMISTRY · Single correct · A Level · Chemistry · Thermodynamics · Thermodynamics

Problem

A student wants to calculate ΔG∘\Delta G^\circ for the decomposition reaction CaCO3(s)→CaO(s)+CO2(g)\mathrm{CaCO_3(s)\rightarrow CaO(s)+CO_2(g)} Which set of terms must be included in the summation when using tabulated ΔGf∘\Delta G_f^\circ values at 298 K? (a) ΔGf∘(CaCO3(s))−[ΔGf∘(CaO(s))+ΔGf∘(CO2(g))]\Delta G_f^\circ(\mathrm{CaCO_3(s)})-\big[\Delta G_f^\circ(\mathrm{CaO(s)})+\Delta G_f^\circ(\mathrm{CO_2(g)})\big] (b) Only ΔGf∘(CO2(g))\Delta G_f^\circ(\mathrm{CO_2(g)}) (c) [ΔGf∘(CaO(s))+ΔGf∘(CO2(g))]−ΔGf∘(CaCO3(s))\big[\Delta G_f^\circ(\mathrm{CaO(s)})+\Delta G_f^\circ(\mathrm{CO_2(g)})\big]-\Delta G_f^\circ(\mathrm{CaCO_3(s)}) (d) ΔGf∘(CaO(s))−ΔGf∘(CaCO3(s))\Delta G_f^\circ(\mathrm{CaO(s)})-\Delta G_f^\circ(\mathrm{CaCO_3(s)})

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