Question

Which has/have a positive value(s) of $\Delta H$ ?

• A. $H _2( g ) \rightarrow 2 H ( g )$
• B. $H ( g ) \rightarrow H ^{+}( g )+ e$
• C. $H _2 O ( l ) \rightarrow H _2 O ( g )$
• D. $H ^{+}(a q)+ OH ^{-}(a q) \rightarrow H _2 O$

Answer 1

Answer: (A), (B), (C)

Correct answer is (a) $H _2( g ) \rightarrow 2 H ( g )$Correct answer is (b) $H ( g ) \rightarrow H ^{+}( g )+ e$Correct answer is (c) $H _2 O ( l ) \rightarrow H _2 O ( g )$