Is the reaction si (s) + 2 h2 (g) --> sih4 (g) spontaneous under standard conditions at 298 k? answer this question by calculating delta-s(universe). the "system" is comprised of the reactants and products. a. what is delta-s(universe)?

i do not get it   at all

i believe the answer is true.

ca has a crystalline lattice with positive ions (since it is a metal, metals are positively charged) and electrons flow freely in its structure since the ca atoms have a large nuclear radius so the electrons are not tightly held, therefore the electrons can flow freely since they are not being highly attracted by the nucleus. moreover, one of the properties of metals are that they are conductors of electricity, thus proving ca is the element.