I'm not understanding quite how to do this type of problem. The problem states: What is...

Free

60.1K

Verified Solution

Question

Chemistry

I'm not understanding quite how to do this type of problem. Theproblem states: What is the enthalpy change produced by thereaction of 50.0 g Fe2O3 with 50.0 g Al according to the equationbelow?
Fe2O3(s) + 2Al(s) => Al2O3(s) + 2Fe(s) Delta H = -851.5kJ
Please show me how to do this!

Answer & Explanation Solved by verified expert

4.2 Ratings (591 Votes)

moles of Fe2O3 = mass / molar mass of Fe2O3

Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â = 50 / 159.69

Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â = 0.313

moles of Al = 50 / 27 = 1.852Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â

Fe2O3(s) + Â Â 2Al(s)Â Â --------------------> Al2O3(s) + 2Fe(s)Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Delta H = -851.5 kJ

Â Â 1 molÂ Â Â Â Â 2 molÂ Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â 1 mol

0.313Â Â Â Â Â Â Â Â Â Â Â Â 1.852Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â

here limiting reagent is Fe2O3 . so heat formed according to that.

1 mol Fe2O3 ------------------- delta H = - 851.5 kJ

0.313 mol Fe2O3 -------------Â Â delta H = ??

heat formed = - 266.5 kJ

Get Answers to Unlimited Questions

Join us to gain access to millions of questions and expert answers. Enjoy exclusive benefits tailored just for you!

Membership Benefits:

Unlimited Question Access with detailed Answers
Zin AI - 3 Million Words
10 Dall-E 3 Images
20 Plot Generations
Conversation with Dialogue Memory
No Ads, Ever!
Access to Our Best AI Platform: Flex AI - Your personal assistant for all your inquiries!

Become a Member