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February 22, 2026, 12:09:06 am
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Author Topic: Question from CSE 2010 paper  (Read 604 times)  Share 

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grace10111

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Question from CSE 2010 paper
« on: November 09, 2010, 09:26:04 am »
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Question 4 in multiple choice,
"What energy change occurs when 3.0g of hydrogen reacts with 14.0g of oxygen according to the following equation?
2H2 + O2 <-> 2H2O               enthalpy= -572kJmol-1

my answer was 500kJ released, but the answers say 250kJ. Have I made a mistake?
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matt123

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Re: Question from CSE 2010 paper
« Reply #1 on: November 09, 2010, 09:38:24 am »
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Quote from: grace10111 on November 09, 2010, 09:26:04 am
Question 4 in multiple choice,
"What energy change occurs when 3.0g of hydrogen reacts with 14.0g of oxygen according to the following equation?
2H2 + O2 <-> 2H2O               enthalpy= -572kJmol-1

my answer was 500kJ released, but the answers say 250kJ. Have I made a mistake?

Bro. You divided by 16 for oxygen instead of dividing by 32
:)
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grace10111

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Re: Question from CSE 2010 paper
« Reply #2 on: November 09, 2010, 09:39:16 am »
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ohhhhhhhhhhhhhhhhhhhhhhhhhhhhh thats embarrassing
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MATEEN GHODSIAN: Hey babe.
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grace10111

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Re: Question from CSE 2010 paper
« Reply #3 on: November 09, 2010, 09:40:09 am »
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have you done Q11 then?
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2011| Science at Monash Uni (hopefully!)

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matt123

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Re: Question from CSE 2010 paper
« Reply #4 on: November 09, 2010, 09:41:56 am »
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Quote from: grace10111 on November 09, 2010, 09:40:09 am
have you done Q11 then?

Sec ill check it cobba
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matt123

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Re: Question from CSE 2010 paper
« Reply #5 on: November 09, 2010, 09:42:53 am »
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i dont have the paper lol
Did it when finaz gave it to us then chucked it into my paper pile = cant find it

lol wats the question babeeeeeeeeeeeeezzzzzzzshhkaa
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2009 : Physical Education
2010  ATAR : 91.45 , Bio , Chem , Methods , Psychology , English
Completed VCE at the age of 16.
2011 : Bachelor of pharmacy
2012 : Hopefully med? " crosses fingers"
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