he compound carbon suboxide, C3O2, is a gas at room temperature. Use the data supplied to calculate the heat of formation of carbon suboxide.Data:2CO(g) + C(s) → C3O2(g), ΔH° = 127.3 kJ/mol and ΔH°f of CO(g) = -110.5 kJ/mol)

The compound (X) on heating gives a colourless gas. The residue dissolved in water to obtain (Y). Excess CO2 is bubbled through aqueous solution of (Y), (Z), is formed. (Z) on gentle heating gives white (X). The compound (X) is :ACaCO3 BNa2CO3 CCaSO4.2H2O DK2CO3

Calculate the heat of the following reaction:C6H12O6 → 2C2H5OH + 2CO2Given the following heats of formation:C6H12O6                ΔH°f=  -1260 kJ/molC2H5OH                ΔH°f=  -277.7 kJ/molCO2                      ΔH°f=  -393.5 kJ/molGroup of answer choices-336.1 kJ/mol-1266 kJ/mol-22.6 kJ/mol-82.4 kJ/mol

On complete combustion of 0.492 g0.492 g of an organic compound containing C,HC,H and O,0.7938 gO,0.7938 g of CO2CO2 and 0.4428 g0.4428 g of H2OH2O was produced. The %% composition of oxygen in the compound is____. (Nearest Integer)

The bond energies are: C-H 416 kJ/mol; C-C 356 kJ/mol; C=C 598 kJ/mol; O=O 498 kJ/mol; C=O 803 kJ/mol; H-O 467 kJ/mol.The heat released or absorbed by the reaction is: _________

O iso-octano (C8H18 = 114 g/mol) é o principal componente da gasolina, e sua combustão pode ser representada pela seguinte equação termoquímica:C8H18(l) + 25/2 O2(g) → 8 CO2(g) + 9 H2O(l) ∆HoC = –5 400 kJ/molQual é a energia máxima liberada na combustão de 45,6 g de C8H18?a)1 080 kJb)2 160 kJc)3 240 kJd)4 320 kJe)5 250 kJ