Choose spontaneos or non spontaneous reactions/process ✓ A waterfall runs uphill ✓ Water freezes below 0°C ✓ Heat flow from hotter object to colder one a. nonspontaneous b. spontaneous c. spontaneous

The following reaction is endothermic. 2NH3(g) → N2(g) + 3H2(g) This means the reaction   A. will be spontaneous at high temperatures. B. will be spontaneous at low temperatures. C. is not spontaneous at any temperature. D. is spontaneous at all temperatures.

49.For the decomposition of hydrogen peroxide to water and oxygen,         H2O2(g) ⟶⟶ H2O(g) + O2(g) ΔΔH° = -106 kJ, and ΔΔS° = +0.0580 kJ/K. In what temperature range is the reaction spontaneous (ΔΔG° < 0)? A. The temperature must be greater than 1.83××103 K B. The temperature must be less than 1.83 ××103 K. C. The temperature must be between 225 K and 1.83 ××103 K. D. ΔΔG° is always less than zero. E. ΔΔG° is never less than zero.

If the process is exothermic and not spontaneous, then what must be TRUE? O a. AS0 O c. AH=0 O d. AS> 0

4. Select all that is considered spontaneous a. Cleaning your room b. A piece of bread molding after being left out in the sun c. A bomb exploding d. Pushing a ball up a ramp e. Ice melting f. Frying an egg g. Putting together a puzzle