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Chemistry
Which of the following equations corresponds to the definition of enthalpy of formation at 298 K ?
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Q. Which of the following equations corresponds to the definition of enthalpy of formation at $298\, K$ ?
Thermodynamics
A
$C$ (graphite) $+2 H _2( g )+1 / 2 O _2(l) \rightarrow CH _3 OH ( g )$
B
$C$ (diamond) $+2 H _2( g )+1 / 2 O _2( g ) \rightarrow CH _3 OH (l)$
C
$2 C$ (graphite) $+4 H _2( g )+ O _2( g ) \rightarrow 2 CH _3 OH (l)$
D
$C$ (graphite) $+2 H _2( g )+1 / 2 O _2( g ) \rightarrow CH _3 OH (l)$
Solution:
In enthalpy of formation, reactants and products must be in most stable standard state