Question

the heat of combustion of ethane is -373kcals/moles predict the heat of combustion of butane

Answer 1

Well this is tricky

Answer 2

i cant even think of how to go about it

Answer 3

is this all thats given?

Answer 4

yea

Answer 5

i wrote something below the earlier qstn...lolo

Answer 6

let the heat of combustion of ethane be = x +6y=-373
then for butane the equation is = 3x+10y
here x is the bond dis asociation energy for carbon-carbon whilst y is that for carbon-hydrogen...
the equation hangs and hence prooves ur data is not suficient :P

Answer 7

yes id need the heat of formation of water for this

Answer 8

how old r u lolo?

Answer 9

this is incomplete

Answer 10

wea did 3x+10y come from?

Answer 11

its just the bond enthalpies

Answer 12

in butane , the number of carbon-carbon bonds is 3. and the number of carbon hydrogen bond is 10... so by the convention i've taken its 3x+10y :)

Answer 13

nah c-c in butane is 4

Answer 14

c-c bonds in butane are 3

Answer 15

ok ok i get it now thanx guys