28.0 L of CO2 is produced on complete combustion of 16.8 L gaseous mixture of ethene and methane at 25°C and 1 atm. Heat evolved during the combustion process is ______. kJ. Given: Hc (CH4) = – 900 kJ

Question

28.0 L of CO2 is produced on complete combustion of 16.8 L gaseous mixture of ethene and methane at 25°C and 1 atm. Heat evolved during the combustion process is ______. kJ. Given: Hc (CH4) = – 900 kJ mol–1 Hc (C2H4) = – 1400 kJ mol–1

Prashant Kotian · Accepted Answer

Correct answer: .. CH4 + 2O2  CO2 + 2H2O x x C2H4 + 3O2  2CO2 + 2H2O 16.8–x 2(16.8–x) x + 2 (16.8 – x) = 28 CH4 = x =5.6 L C2H4 = 16.8 – 5.6 = 11.2 L nCH4 = 1 . 6 .  nC2H4 = 1 . 2 .   Heat released = 2 900 1    = 225 + 700 = 925 KJ | JEE(Main) 2023 | DATE : 25-01-2023 (SHIFT-2) | PAPER-1 | OFFICIAL PAPER | CHEMISTRY PAGE # 9

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