Question 4 Not changed since last attempt Marked out of 1.00 Calculate w (in kJ) when 189 g iron (III) oxide (MM =...

Question 4 Not changed since last attempt Marked out of 1.00 Calculate w (in kJ) when 189 g iron (III) oxide (MM = 159.7 g/mol) reacts with excess carbon to produce carbon dioxide gas at 451 K: 2Fe2O3(s) + 3C(s) + 4Fe(s) + 3CO2(g) P Flag question Answer: Question 5 Not yet answered Calculate the work (in kJ) when 2.20 moles of methane react with excess oxygen at 470 K: Marked out of 1.00 CH4(g) + 20 (g) + CO2(g) + 2H2O(1) P Flag question Answer: Question 6 Not yet answered A reaction at 3.52 atm consumes 5.90 L of a gas adiabatically (-0). Calculate the change in internal energy of the system (in kJ). Marked out of 1.00 Hint given in feedback. P Flag question Answer:

A reaction at 4.21 atm produces 24.6 L of a gas and evolves 69.7 kJ of heat (exothermic). Calculate the change in internal energy of the system (in kJ). Question Not yet answered Marked out of 1.00 P Flag question Answer: Question 8 Not yet answered 1.495 g of an unknown hydrocarbon (108.1 g/mol) burns in bomb calorimeter in excess oxygen. The heat capacity of the calorimeter,cy, = 5.294 kJ/°C and AT =6.744 °C. Find AE for this hydrocarbon in kJ/mol. Marked out of 1.00 Hint given in feedback. P Flag question Answer: Question 9 Not yet answered Marked out of 1.00 Using the technique of the previous problem AE was found to be -2,000.00 kJ/mol of an unknown liquid hydrocarbon at 298 K. In another experiment it was determined that for each mole of hydrocarbon, 6 moles of oxygen gas are consumed and 7 moles of CO2 gas and 7 moles of H2O liquid are produced. Find AH per mole of this hydrocarbon (in kJ) at 298 K. P Flag question Hint given in feedback. Not used to answer question: This question is a bit awkward and unrealistic for molar amounts, but allows for random numbers. An example of a possible reaction is: C2H4 (OH)2(1) +2.502(g) →2C02(g)+ 3H2O(1)