A mixture of ethene and ethine 26.88 liters (0*C, 101325 Pa) was burned. In this case, 1640 kJ of heat was released. Calculate the volume ratio of each of the gases in the initial mixture based on thermochemical equations of chemical reactions: С2Н2 + 2,5О2 = 2СО2 + Н2О + 1300 kJ; С2Н4 + 3О2 = 2СО2 + 2Н2О + 1400 kJ.