What is true about the spontaneity of a reaction? When the products have less enthalpy than the reactants, the reaction is always spontaneous.
When the products have more enthalpy than the reactants, the reaction is always spontaneous.
When the products have less enthalpy than the reactants, the reaction tends to be spontaneous.
When the products have more enthalpy than the reactants, the reaction tends to be spontaneous.

answer is: naturally occurring solid, inorganic compound or element is mineral.

minerals usually have crystalline form, that means than crystal constituents (atoms, molecules or ions) are arranged in a highly ordered microscopic structure, forming a crystal lattice that extends in all directions.

for example magnetite is a mineral of iron oxide (fe₂o₃).

calcite is a carbonate mineral and the most stable polymorph of calcium carbonate (caco₃).

dolomite is an   carbonate mineral composed of calcium magnesium carbonate (camg(co₃)₂).

what are the statements