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Which steps in the above process can be represented by the following potential energy diagram? Debon...
Calculate the enthalpy of reaction for the following reaction: Question 19 Not yet answered Marked out of 1.00 Fe2O3(s) + 3CO(g) – 2Fe(s) + 3C02(9) P Flag question AH °(Fe2O3(s)) = -824.2 kJ/mol AH°(CO(g)) = -110.5 AH°(Fe(s)) = ? AH°(CO2(g)) = -393.5 kJ/mol Answer:
Question 17 Not yet answered Calculate the enthalpy of reaction for the following reaction: 2Fe2O3(s) + 3C(s) - 4Fe(s) + 3CO2(g) Marked out of 1.00 Flag question AHI°(Fe2O3(s)) = -824.2 kJ/mol AH(C(s)) = ? AH®(Fe(s)) = ? AH(CO2(g)) = 3935 kJ/mol Answer:
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)...
Question 6 Not answered Marked out of 1.00 If the above reaction could be done at 3399 K, what would be your estimate for AGº (in kJ) at this elevated temperature? Use AG° =AH° -TAS® and assume AH° and 4Sº are independent of temperature. P Flag question (Theº is included because it is still for standard conditions, that is, 1 atm for gases and 1 molar for concentrations.) Answer: What is Agrº (in kJ) at 2268 K for the following...
Calculate the standard free-energy change at 25°C for the reduction of iron (III) oxide with carbon monoxide: Fe,0,(s) + 3 CO(g) → 2 Fe(s) + 3 CO2(g) AG®(Fe,0,) = -742.2 kJ/mol AG (CO) = -137.2 kJ/mol AG® (CO2) = -394.4 kJ/mol
Hydrogen, a potential future fuel, can be produced from carbon (from coal) and steam by the following reaction: C(s,graphite)+2H2O(g)→2H2(g)+CO2(g) Note that the average bond energy for the breaking of a bond in CO2 is 799 kJ/mol. Use average bond energies to calculate ΔHrxn for this reaction.
can you do the 7 and 9 ? can you also show and explain me step by step? D. 49.6 kJ E. 57.3 kJ 7. Butane (C4H10) undergoes combustion in excess oxygen to generate gaseous carbon dioxide and water. Given AH° [C4H10(g)] = -124.7 kJ/mol, AH° [CO2(g)] = -393.5 kJ/mol, AH [H2O(g)] = -241.8 kJ/mol, how much energy is released (kJ) when 8.30 g of butane is burned? Combustion of butane: 2 CH2(g) + 13 O2(g) → 8 CO2(g) +...
Calorimetry Problems: AH = m(at), Exercise #6: Enthalpy Problems 300 kg of water cools from 5 to 20 How much beat energy was released by the water? Co H2O(l) is 4.180 J/gºC. 4. How much heat energy is required to heat 45 g of sheet Fe from 24°C to 200."C?, of Fe(s) is 0.449 J/gºC. 3. A food chemist combusts 56 g of a chocolate bar in a calorimeter containing 1.5 L of water (density Ho mL). The initial temperature...
Question Not yet answered 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). Marked out of 1.00 Answer: Flag question Question 8 Not yet answered Marked out of 1.00 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...
please help I need help understanding, explain steps too, thank you 4. Given the following two thermochemical equations, determine the AHx,unknown. Fe2O3(s) + 3 CO(g) → 2 Fe(s) + 3 CO2(g) AHørxn=-26.7 kJ CO(g) + 42 02(g) - CO2(g) AHºrx= -283.0 kJ 2 Fe(s) + 3/2 02(9) Fe2O3(s) AHºrxn unknown= ? 5. Calculate AHº for the reaction 2 C(s) + H2(g) – C2H2(g) Given the following data C2H2(g) + 5/202(g) → 2C02(g) + H20(C) C(s) + O2(g) → CO2(g) Hz(9)...