Not answered Marked out of 1.00 Calculate the work (in kJ) done on the system when 1.30 moles of hydrogen gas are produced from the reaction of sodium in excess water at 298 K: 2Na(s) + 2H2O(l) â 2NaOH(aq) + H2(g) Answer Flag question Hint, is the work (-) or(+)? Question 4 Not answered Marked out of 1.00 Calculate W (in kJ) when 456 g iron (II) oxide (MM 159.7 g/mol) reacts with excess carbon to produce carbon dioxide gas at 335 K 2Fe2O3(s) + 30(s)--4Fe(s) + 3CO2 (g) Answer: Flag question Hint, is the work (-) or(+)? Question 5 Not answered Marked out of 1.00 Calculate the work (in kJ) when 1.90 moles of methane react with excess oxygen at 380 K: CH4(g) + 2O2(g) â CO2(g) + 2H20(1) Answer: Flag question Hint, what would the answer be for 1 mole of carbon dioxide? Rescale your answer. Pay attention to the sign for the work ã or (+). Question6 Not answered Marked out of 1.00 A reaction at 4.01 atm consumes 8.70 L of a gas adiabatically (q -0). Calculate the change in internal energy of the system (in kJ) Hint given in feedback. Answer