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Shweta Thakur posted an Question
July 30, 2020 • 02:30 am
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30 points
30 points
- IIT JAM
- Chemistry (CY)
Plz check this question ..i'm not getting correct answer modern approach to chemical calculatiions bond energy yd sob ex ex. 52. the h
Modern Approach to Chemical Calculatiions BOND ENERGY yd sob Ex Ex. 52. The heat of formation of methane is -17.9 kcal. If the heats of atomisatin of carbon and hydrogen are 170:9 and 52-1 kcal per mole, calculate the C bond energy in methane. bre 0 Solution: Given that, C(s) +2H (8)> CH, (g); AH=-17.9 kcal So
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Priyanshu kumar Best Answer
calculate it Shweta
is it visible?
but m using this formula
here all the data is given so directly you find heat of formation of C-H bond
any doubt shweta??
yes
is this formula wrong
I have used this formula but didn't get the answer
shweta think here x comes to positive when you calculate but you know bond energy is always positive...so here according to your calculation B.E comes to be -90.3
here heat if formation is negative means reactions is exothermic means the amount of energy it takes to break bonds is less than the amount of energy that is released when making the bonds.
sir I didn't get this
why I can't use formula which I have sent u
yes shweta explaining....little bit busy
shweta i will check this and send it to u...current query and this query
please wait