Someone please help and explain, I only need c and d done Using values from Appendix C, calculate the standard enthalpy change for each of the following reactions:
(a) 2 SO2(g) + O2(- 2 SO3(g)
(b) Mg(OH)2(s) - MgO(s) + H2O(1)
(c) CH (8) + 4Cl2(g) — CCI (1) + 4 HCI(g)
(d) SiCl4(1) + 2 H2O(l) —— SiO2(s) + 4 HCl(g)

Explanation:

I have no clue

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).

it is the most commonly accepted one