The density of water at 400c is 0.992 g/ml what is the volume of 27.0 g of water at this temperature?

Volume of water at this temperature is 27.2 mL

Explanation:

We know that

Here density of water is 0.992 g/mL

Here mass of water is 27.0 g

So

                         =

                         = 27.2 mL

e

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.