Question

Write and balance the combustion reaction for ethyne (C2H2(g)) at 298.15 K and write down the expression for the reaction quotient, Q. Calculate Q to the third decimal place when half the reactants have been transformed into products. Assume that at the beginning of the reaction, the reactive mixture consisted only of ethyne (Et) and oxygen (Ox) gases in stoichiometric amount with partial pressures PEt = 0.100 bar.