Table salt is a compound that is made from an equal number of chlorine atoms and sodium atoms bonded together. Which of the following are properties of table salt? I. It is a toxic gas.
II. It is a soft shiny metal.
III. It can dissolve easily in water.
IV. It forms a crystalline solid.
A.
I & II only
B.
I, II, III, & IV
C.
I, III, & IV only
D.
III & IV only

c is the answer I think I hope it's right

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.