For which one of the following reactions will ΔH be approximately (or exactly) equal to ΔE?
A) H 2( g) + Br 2( g) → 2HBr( g)
B) H 2O( l) → H 2O( g)
C) CaCO 3( s) → CaO( s) + CO 2( g)
D) 2H( g) + O( g) → H 2O( l)
E) CH 4( g) + 2O 2( g) → CO 2( g) + 2H 2O( l)
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