Heat of solution, sometimes interchangeably called enthalpy of solution, is said to be the energy released or absorbed when the solute dissolves in the solvent. A solute is that which can dissolve in a solvent, to form a solution
Under the definition of force on a magnetic field we proceed to make the point a,
A)
Since the field is perpendicular, then \theta = 0
b) The direction of the magnetic field would be done in + Zdirection. This when understanding that the vector extends along the z + axis of the formula