Which type of reaction is always spontaneous? A. an exothermic reaction that has an increase in disorder

B. an exothermic reaction that has a decrease in disorder

C. an endothermic reaction that has an increase in disorder

D. an endothermic reaction that has a decrease in disorder

Consider the following reactions. (note: (s) = solid, (l) = liquid, and (g) = gas.) mg(s) + ½o2(g) → mgo(s) + 146 kcal/mole h2(g) + ½o2(g) → h2o(g), δh = -57.82 kcal/mole what type of reaction is represented by the previous two examples?

When a chemist collects hydrogen gas over water, she ends up with a mixture of hydrogen and water vapor in her collecting bottle if the pressure in the collecting bottle is 97.1 kilopascals and the vapor pressure of the water is 3 2 kilopascals, what is the partial pressure of the hydrogen?

If a computer chip switches off -on-off in 0.015 us, what is the switching time in nanoseconds?