Homework Answers
8Al(s) + Fe2O3(s) -------> Al2O3(s) + 2Fe(s) + 202.8kcal/mol
i) Stoichiometrically, 8moles of Al gives 202.8kcal of heat
Mole = mass/molar mass
moles of Al = 30.0g/26.98g/mol = 1.1119mol
Heat generated by 30.0g of Al reaction = ( 202.8kcal/8mol) × 1.1119mol
= 28.19 kcal
ii) Moles Al needed = ( 8mol/202.8kcal) × 1000kcal = 39.448mol
stoichiometrically, 8moles of Al react with 1mole of Fe2O3
39.448 moles of Al react with 4.931moles of Fe2O3
Therefore
mass of Al required = 39.448mol × 26.98g/mol = 1064.3g
maas of Fe2O3 required = 4.931mol × 159.7g/mol = 787.5g
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(5) - The following reaction is the thermite reaction used in underwater (and space) welding: 8Al)...
(5) - The following reaction is the thermite reaction used in underwater (and space) welding: 8Al+Fe,...
(5) - The following reaction is the thermite reaction used in underwater (and space) welding: 8Al+Fe, 036 - A1,03 + 2Fe + 202.8 kcal/mol How many kilocalories of heat are generated when 30.0 g of Al are reacted completely in the above thermite reaction? ii) If you need 1.00x10' kcal of heat, how many grams of Al and Fe2O3 are needed?
(5). The following reaction is the thermite reaction used in underwater (and space) welding: 8A1, +Fe,...
(5). The following reaction is the thermite reaction used in underwater (and space) welding: 8A1, +Fe, A1,0 + 2Fe + 202.8 kcal/mol How many kilocalories of heat are generated when 30.0 g of Al are reacted completely in the above thermite reaction? ii) If you need 1.00x10 kcal of heat, how many grams of Al and Fe:Os are needed?
(5) - The following reaction is the thermite reaction used in underwater (and space) welding: 8Als)+Fe,...
(5) - The following reaction is the thermite reaction used in underwater (and space) welding: 8Als)+Fe, 03() ► A1,03 + 2Fe + 202.8 kcal/mol i), How many kilocalories of heat are generated when 30.0 g of Al are reacted completely in the above thermite reaction? If you need 1.00x 10 kcal of heat, how many grams of Al and Fe,O, are needed?
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Question 7 1 pts The thermite reaction, used for welding iron, is the reaction of Fe3O4 with Al. 8 Al(s) + 3 Fe3O4 (s) —+ 4 A1203 (s) + 9 Fe (s) AH° = -3350. kJ/mol rxn Because this large amount of heat cannot be rapidly dissipated to the surroundings, the reacting mass may reach temperatures near 3000. °C. How much heat (in kJ) is released by the reaction of 17.2 g of Al with 70.5 g of Fe3O4? Enter...
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he thermite reaction, used for welding iron, is the reaction of Fe3O4 with Al. 8 Al (s) + 3 Fe3O4 (s) \longrightarrow ⟶...
he thermite reaction, used for welding iron, is the reaction of Fe3O4 with Al. 8 Al (s) + 3 Fe3O4 (s) \longrightarrow ⟶ 4 Al2O3 (s) + 9 Fe (s) \Delta Δ H° = -3350. kJ/mol rxn Because this large amount of heat cannot be rapidly dissipated to the surroundings, the reacting mass may reach temperatures near 3000. °C. How much heat (in kJ) is released by the reaction of 16 g of Al with 76.3 g of Fe3O4? Enter...
Over the years, the thermite reaction has been used for welding railroad rails, in incendiary bombs, and to ignite...
Over the years, the thermite reaction has been used for welding railroad rails, in incendiary bombs, and to ignite solid-fuel rocket motors. The reaction is Fe, Os() + 2Al() + 2Fe(l) + Al, Os(-) a What mass of iron(III)oxide must be used to produce 15.7 g iton? Mass- b. What mass of aluminum must be used to produce 15.7 g iron? Mass- c. What is the maximum mass of aluminum oxide that could be produced? Mass- Submit Answer Try Another...
CHEM 1340 Hybrid Fall 2019 <Chapter 7 Problem 7.85 The thermite reaction (photograph, P. 185 in...
CHEM 1340 Hybrid Fall 2019 <Chapter 7 Problem 7.85 The thermite reaction (photograph, P. 185 in the textbook), in which aluminum metal reacts with iron(III)oxide to produce a spectacular display of sparks, is so exothermic that the production) is in the molton State 2Al(s) + FeO3(s) + All Os(s) +2Fe() AH-202.9 kcal/mol Part A How much hatin kilocalories) is released when 6.46 g of Al is used in the reaction? 180 AED RO? Submit Request Answer Provide Feedback Type here...
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(5) - The following reaction is the thermite reaction used in underwater (and space) welding: 8Al+Fe, 036 - A1,03 + 2Fe + 202.8 kcal/mol How many kilocalories of heat are generated when 30.0 g of Al are reacted completely in the above thermite reaction? ii) If you need 1.00x10' kcal of heat, how many grams of Al and Fe2O3 are needed?
(5). The following reaction is the thermite reaction used in underwater (and space) welding: 8A1, +Fe, A1,0 + 2Fe + 202.8 kcal/mol How many kilocalories of heat are generated when 30.0 g of Al are reacted completely in the above thermite reaction? ii) If you need 1.00x10 kcal of heat, how many grams of Al and Fe:Os are needed?
(5) - The following reaction is the thermite reaction used in underwater (and space) welding: 8Als)+Fe, 03() ► A1,03 + 2Fe + 202.8 kcal/mol i), How many kilocalories of heat are generated when 30.0 g of Al are reacted completely in the above thermite reaction? If you need 1.00x 10 kcal of heat, how many grams of Al and Fe,O, are needed?
Question 7 1 pts The thermite reaction, used for welding iron, is the reaction of Fe3O4 with Al. 8 Al(s) + 3 Fe3O4 (s) —+ 4 A1203 (s) + 9 Fe (s) AH° = -3350. kJ/mol rxn Because this large amount of heat cannot be rapidly dissipated to the surroundings, the reacting mass may reach temperatures near 3000. °C. How much heat (in kJ) is released by the reaction of 17.2 g of Al with 70.5 g of Fe3O4? Enter...
Be sure to give your answers with the correct number of significant figures. 1. Over the years, the thermite reaction has been used for welding railroad rails, in incendiary bombs, and to ignite solid-fuel rocket motors. The reaction is: Fe20. (s) + 2Al(s) – 2Fe (1) + Al O2 (s) a. How many moles of iron (III) oxide must react in order to produce 3.5 mol of Fe? (1.25pts) b. What mass of iron (III) oxide reacted in order to...
Over the years, the thermite reaction has been used for welding railroad rails, in incendiary bombs, and to ignite solid-fuel rocket motors. The reaction is Fe, Os() + 2Al() + 2Fe(l) + Al, Os(-) a What mass of iron(III)oxide must be used to produce 15.7 g iton? Mass- b. What mass of aluminum must be used to produce 15.7 g iron? Mass- c. What is the maximum mass of aluminum oxide that could be produced? Mass- Submit Answer Try Another...
CHEM 1340 Hybrid Fall 2019 <Chapter 7 Problem 7.85 The thermite reaction (photograph, P. 185 in the textbook), in which aluminum metal reacts with iron(III)oxide to produce a spectacular display of sparks, is so exothermic that the production) is in the molton State 2Al(s) + FeO3(s) + All Os(s) +2Fe() AH-202.9 kcal/mol Part A How much hatin kilocalories) is released when 6.46 g of Al is used in the reaction? 180 AED RO? Submit Request Answer Provide Feedback Type here...
conversion factors needed: molar masses of O, and Ho, and molar ratio between Ozand Ho. Molar mass Oz: 2 x 16.00 g/mol = 32.00 g/mol Molar mass HO: (2x 1,01 g/mol)*16.00 /mol 7HO-1.5 80xmor 2 mol No1802 1,0 52.00 gomolo 1 .689 = 1.7 HO Now let's try some problems Be sure to give your answers with the correct number of significant figures. 1. Over the years, the thermite reaction has been used for welding railroad rails, in incendiary bombs,...
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