Which of the following combinations will result in a reaction that is never spontaneous?
1) positive enthalpy change and positive entropy change
2) positive enthalpy change and negative entropy change
3) negative enthalpy change and positive entropy change
4) negative enthalpy change and negative entropy change

was that the right answer

maybe the spark is gone, love is a weird emotion and there is a possibility he may have found somebody else.

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).