Top Posters
Since Sunday
New Topic  
bklm1234 bklm1234
wrote...
Posts: 140
Rep: 0 0
A month ago

Suppose a new metallic element X is discovered, and its reactions with oxygen gas and chlorine gas at 298 K are studied.

Trial

Reaction

ΔHºrxn (kJ/mol)

1

4X(s) + 3O2(g) → 2X2O3(s)

–600

2

2X(s) + 3Cl2(g) → 2XCl3(s)

–800

3

4XCl3(s) + 3O2(g) → 2X2O3(s) + 6Cl2(g)

–200

However, it is later discovered that one of the samples was contaminated, and the ΔHºrxn value from this trial is not reliable. Which trial had the contaminated sample, and what should the correct value of ΔHºrxn be for this trial?



▸ Trial 1 had the contaminated sample; its ΔHºrxn value should be –900 kJ/mol.

▸ Trial 2 had the contaminated sample; its ΔHºrxn value should be +100 kJ/mol.

▸ Trial 3 had the contaminated sample; its ΔHºrxn value should be –1000 kJ/mol.

▸ Trial 3 had the contaminated sample; its ΔHºrxn value should be +1000 kJ/mol.

▸ Not enough information is provided; all three trials must be redone.
Textbook 
Chemistry: Atoms First

Chemistry: Atoms First


Edition: 4th
Author:
Read 20 times
1 Reply
Replies
Answer verified by a subject expert
hadu582hadu582
wrote...
Posts: 132
Rep: 0 0
A month ago
Sign in or Sign up in seconds to unlock everything for free
More solutions for this book are available here
1

Related Topics

bklm1234 Author
wrote...

A month ago
Helped a lot
wrote...

Yesterday
Thanks
wrote...

2 hours ago
You make an excellent tutor!
New Topic      
Explore
Post your homework questions and get free online help from our incredible volunteers
  716 People Browsing
Related Images
  
 268
  
 31472
  
 152
Your Opinion
Do you believe in global warming?
Votes: 422