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Question

CH4(g)+1/2O2(g)CH3OH(l)
If ΔcH of CH4=x and ΔcH of CH3OH=y
Then, ΔH for reaction:

A
xy
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B
x+y
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C
xy
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D
x+y
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Solution

The correct option is B xy
Given, CH4+2O2CO2+2H2O.....(i) H=x
CH3OH+32O2CO2+2H2O.....(ii) H=y
____________________________________________________
Subtracting (ii) from (i)
CH4+12O2CH3OH H=x+y

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