Will the following reaction occur spontaneously at 25°C? Justify your answer. 3 O2(g) → 2 O3(g)
∆H°rxn = 285 kJ/mol ∆S°rxn = −137 J/mol·K

Asolution is made by dissolving 25.5 grams of glucose (c6h12o6) in 398 grams of water. what is the freezing point depression of the solvent if the freezing point constant is -1.86 °c/m? show all of the work needed to solve this problem.

Modern weaponry has increased the number of deaths in wars and violent conflicts.

The bond energy for the van der waals bond between two helium atoms is 7.9×10−4ev. assuming that the average kinetic energy of a helium atom is (3/2)kbt, at what temperature is the average kinetic energy equal to the bond energy between two helium atoms