For which solutes dissolved in a liquid is the overall enthalpy of solution exothermic? some gases and most solids some solids and most gases few solids and few gases most solids and most gases

Most solids and most gases

Explanation:

That is the reason why the gases solution is favored at low temperatures, because its solution is generally exothermic; the temperature increases and then it is more difficult to dissolve more of that gas. The solids solution is generally exothermic as well, releasing energy to the surroundings. In both cases, the reason is that gases and solids molecules are close to other molecules in the liquid phase, so it decrease its potential energy because of the intermolecular interactions.

since the atomic number is the number of protons in the nucleus, as we move to the left on the periodic table, the electrostatic pull between the nucleus and the valence electron shell decreases. as we move down a group (vertical column), the valence shell energy level gets further and further from the nucleus.

"standard molar enthalpy:

h2o ( liquid water ) : - 285.8 kj/mole

h2o ( water vapor ) : - 241.8 kj / mole.

δhrxn = - 241. 8 - ( - 285.8 )= -241.8 + 285.8 = 44.0

answer: 44.0 kj"