How do I calculate these?? Calculate the values of Ea (activation energy) and ΔH (enthalpy) if the PE of the reactants is 200 kJ/mol, the PE of the products is 300 kJ/mol, and the PE of the transition state is 450 kJ/mol.

Ea (activation energy) =

ΔH (enthalpy) =

the cold front replaces the warmer air at the ground level changing the wind to be breezy and denser.there is also an immediate drop in the temperature.

the objects have the same charge.

qualitative observation deals with data that can be observed with our senses: sight, smell, touch, taste, and hearing. they do not involve measurements or numbers. for instance, colors, shapes, and textures of objects are all qualitative observations.