AP Chemistry· difficulty 2/5
What is the sign of ΔS° for this reaction?
Positive; gas moles decrease
Negative; gas moles decrease
Positive; gas moles increase
Zero; same number of atoms
Explanation
Going from 2 mol gas to 1 mol gas decreases disorder, so ΔS° < 0.
Want 10 more like this — adaptive to your weak spots?
Calculate \Delta S^\circ for 2H2(g) + O2(g) \rightarrow 2H2O(g) given S^\circ: H2 = 130.7, O2 = 205.2, H2O(g) = 188.8 J/mol·K.…
chevron_rightWhat is the sign of ΔS for vaporizing water?…
chevron_rightUnlike ΔH°f, S° for a pure element at standard state is…
chevron_right