Q.57 The thermodynamic data at 298 K for the decomposition reaction of limestone at equilibrium is given below CaCO3(6) CaO(s) + CO(g) Thermodynamic quantity CaCO:(5) CaO(s) CO:g) (k moH -1128.8 -604.0 394.4 -1206.9 -635.1 393.5 AH k mol) The partial pressure of CO2(g) in atm evolved on heating limestone (rounded of to two decimal places) at 1200 K is . (Given: R =8.314 J K- mol)