For all my friends on out there. I just would like to say my goodbyes, as now all of my brainliests are down the drain. So i figured id give away these points within 8 questions and if they get deleted. 5th time

Don’t do thattt.

Explanation:

The staff delete everything even if it's someone asking for a conversation. It's actually annoying

Explanation:

answer: the enthalpy of the overall chemical reaction is +87.88 kj or +88 kj.

according to hess's law, the overall enthalpy of a reaction is the difference between the sum of enthalpy values of all the products and the sum of enthalpy values of all the reactants.

δh(reaction) = ∑nδh(products) - ∑nδh(reactants)

δh(reaction) = [δh +δh] - [δh]

δh(reaction) = [1(-287.02) + 1(0) ] - [1(-374.9)] kj = +87.88 kj

here, δh (pcl3) = -287.02 kj, δh(cl2) = 0, δh(pcl5) = -374.9 kj

therefore, enthalpy of the overall reaction is +87.88 kj or +88 kj.

the answer for sodium is 0.186

the answer for rubidium is 0.251