CBSE Class 11-science Answered
The values of heatformation of SO2 and SO3 are-398.2 KJ and 198.2 KJ.The heat of formation of the reaction
SO2+1/2 O2 gives SO3 will be
1.-200 KJ
2.356.2 KJ
3.-200 KJ
4.-396.2 KJ
Asked by TVISHA Bhatt | 29 Aug, 2014, 11:13: AM
Expert Answer
Heat of formation of SO2 is 398.2 kJ.
S + O2 → SO2
Reverse the above reaction,
SO2 → S + O2 …… = -398.2 kJ ...... (i)
Heat of formation of SO3 is 198.2 kJ
S + 3/2 O2 → SO3 ...... = 198.2 kJ .....(ii)
Add (i) and (ii) we will get,SO2 + 1/2 O2 → SO3 ...... = -398.2 + 198.2 = -200 kJ
Answered by Arvind Diwale | 31 Aug, 2014, 09:14: PM
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