Calculate the net change in energy for the following reaction:
2na(s) + 2hcl(g) → 2nacl(s) + h2(g)
given the following information:
energy of sublimation of na(s) = 97 kj/mol
bond energy of hcl = 427 kj/mol
ionization energy of na(g) = 496 kj/mol
electron affinity of cl(g) = –349 kj/mol
lattice energy of nacl(s) = –778 kj/mol
bond energy of h2 = 432 kj/mol

-1078 kJ/mol.

Explanation:

Consider this reaction in three steps:

Sources of enthalpy changes in the first step:

That corresponds to an enthalpy change of

.

Sources of enthalpy changes in the second step:

That corresponds to an enthalpy change of

.

Sources of enthalpy changes in the third step:

That corresponds to an enthalpy change of

.

Take the sum of the enthalpy changes of the three steps to find the enthalpy change of the overall reaction:

.

the answer to your question is c

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).