The standard enthalpy of formation,Delta H^o_ | vedclass

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Question

(B) The standard enthalpy of formation,$\Delta H^o_f$,is defined as the enthalpy change when $1 \ mol$ of a compound is formed from its constituent el

Vedclass · Accepted Answer

$C_{(graphite)} + 1/2 O_{2(g)} + 2H_{2(g)} 	o CH_3OH_{(l)}$

Vedclass · Answer

(B) The standard enthalpy of formation,$\Delta H^o_f$,is defined as the enthalpy change when $1 \ mol$ of a compound is formed from its constituent elements in their most stable standard states at $298 \ K$ and $1 \ bar$ pressure.For methanol $(CH_3OH_{(l)})$,the constituent elements are carbon (in its most stable form,graphite),hydrogen $(H_{2(g)})$,and oxygen $(O_{2(g)})$.The balanced thermochemical equation is:$C_{(graphite)} + 1/2 O_{2(g)} + 2H_{2(g)} 	o CH_3OH_{(l)}$Therefore,option $B$ correctly represents the standard enthalpy of formation of methanol.

The standard enthalpy of formation,$\Delta H^o_f$ $(298 \ K)$,of methanol is represented by which of the following chemical equations?

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