Explain why $p-$nitrophenol is more acidic than $o-$nitrophenol?

(N/A) The acidic strength of phenols is determined by the stability of the phenoxide ion formed after the loss of a proton $(H^+)$.
In $o-$nitrophenol,an intramolecular hydrogen bond is formed between the $-OH$ group and the $-NO_2$ group,which makes the release of the proton $(H^+)$ more difficult.
In $p-$nitrophenol,the $-NO_2$ group is far from the $-OH$ group,so no intramolecular hydrogen bonding occurs.
Furthermore,the $-NO_2$ group exerts a strong electron-withdrawing $-I$ and $-M$ effect,which stabilizes the phenoxide ion by dispersing the negative charge.
Due to the absence of intramolecular hydrogen bonding and the effective stabilization of the phenoxide ion,$p-$nitrophenol is more acidic than $o-$nitrophenol.