Question

Consider the following reaction: 2 C2H6(9) + 7 02(9) — 4 CO2(g) + 6H2O(1) Use standard heats of formation from Zumdahl 'Chemical Principles' 8th ed. Appendix Four pp A19 - A21. How much heat is evolved when 5.820 moles of C2H6(9) is burned in excess oxygen. Answer to 4 sig figs. Assume standard conditions. Note that, by convention, a decrease in enthalpy of the system will result in a positive quantity of heat being evolved. 1pts Submit Answer Incorrect. Tries 1/5 Previous Tries How much heat is evolved when 1.136 moles of CO2(9) is produced from the combustion of C2H6(9). Answer to 4 sig figs. 1pts Submit Answer Incorrect. Tries 1/5 Previous Tries How much heat is evolved when 1.203x102 g of C2H6(9) is burned in excess oxygen. Answer to 4 sig figs. 1 pts Submit Answer Incorrect. Tries 1/5 Previous Tries

Please show work step by step

Answer 1

Audi leher 1 mode of ethane is burnt 1557 KT of energy is released This is known as heat of combustion" RC standard condition wer write it as An combustion = 1557 kati/mol. O If we have s.82 noles, the energy ecleased will be =5182 x 1557 IT/mol = 9061.74 KT hnore No of moles - Giver, mais 120.3 4.01 moles Molar Man 30 to the energy releared = 155 784 01 62 43.5 7 KI/nol