If a chemical reaction has a negative AH and a positive AS, then A) it will be spontaneous at all temperatures. B) it will be non-spontaneous at all temperatures. C) it will be spontaneous at high temperatures and non-spontaneous at low temperatures. D) it will be spontaneous at low temperatures and non-spontaneous at high temperatures. E) the absolute entropy of the reactants will be less than 0.

Use the appropriate symbol to represent a non-spontaneous process (>, <, =)  ∆G ________________ 0  ∆E ________________ 0  K _________________ 1 ∆Suniv _____________ 0

choose the right options -When a solid dissolves in a liquid, entropy usually  (increases or decreases?)   So the value for ΔΔS is (positive or negative?)  Remember that negative values of ΔΔG are favorable, and ΔΔG = ΔΔH - TΔΔS.  Consequently, solids are usually more soluble at  (higher or lower?) temperatures.   When a gas dissolves in a liquid, entropy usually (increases or decreases), so the value for ΔΔS is (negative or postive) Remember that negative values of ΔΔG are favorable, and ΔΔG = ΔΔH - TΔΔS.  Consequently, gases are usually more soluble at (lower or higher) temperatures.

if the enthalpy change is negative and the entropy change is positive this reaction would be a) spontaneous at all temperatures b) spontaneous at high temperatures only c) nonspontaneous at all temperatures d) spontaneous at low temperatures only