The standard entropies of CO2(g),C(s) and O2(g) are 213.5, 5.740 and 205 JK-1 respectively. Calculate the standard entropy of formation of CO2(g).

Given :ΔS°CO2=213.5JK-1ΔS°C(s)=5.74JK-1ΔS°O2=205JK-1C(s)+O2( g)⟶CO2( g)Standard entropy of formation of CO2(g)=ΔS°CO2-ΔS°C(s)+ΔS°O2=213.5-[5.740+205]=2.76JK-1