?Without doing any calculations, predict the sign of ?H for each of the following

Chapter 5, Problem 5.82

(choose chapter or problem)

Without doing any calculations, predict the sign of ΔH for each of the following reactions:

(a) \(2 \mathrm{NO}_{2}(g) \longrightarrow \mathrm{N}_{2} \mathrm{O}_{4}(g)\)

(b) \(2 \mathrm{~F}(g) \longrightarrow \mathrm{F}_{2}(g)\)

(c) \(\mathrm{Mg}^{2+}(g)+2 \mathrm{Cl}^{-}(g) \longrightarrow \mathrm{MgCl}_{2}(s)\)

(d) \(\mathrm{HBr}(g) \longrightarrow \mathrm{H}(g)+\operatorname{Br}(g)\)

Text Transcription:

2N_2(g) longrightarrow N_2O_4(g)

2F(g) longrightarrow F_2(g)

Mg^2+(g)+2Cl^-(g) longrightarrow MgCl_2(s)

HBr(g) longrightarrow H(g)+Br(g)

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