Which of the following equations represents t | vedclass

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(B) The standard enthalpy of formation $(\Delta_fH^{\circ})$ is defined as the enthalpy change when $1 	ext{ mole}$ of a compound is formed from its

Vedclass · Accepted Answer

$C(	ext{graphite}) + 2H_{2(g)} ightarrow CH_{4(g)}$

Vedclass · Answer

(B) The standard enthalpy of formation $(\Delta_fH^{\circ})$ is defined as the enthalpy change when $1 	ext{ mole}$ of a compound is formed from its constituent elements in their most stable standard states at $298 	ext{ K}$ and $1 	ext{ bar}$ pressure.
For methane $(CH_4)$,the constituent elements are carbon and hydrogen.
The most stable form of carbon at standard conditions is graphite.
The most stable form of hydrogen is diatomic gas $(H_2)$.
Therefore,the correct equation is: $C(	ext{graphite}) + 2H_{2(g)} ightarrow CH_{4(g)}$.

Which of the following equations represents the standard enthalpy of formation of $CH_4$?

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