QUESTION 3 Determine the volume percent of a solution made by adding 46.3 mL of bleach in enough water to make
total of 175.9 mL of solution. (vol % = solute vol/ solution total vol. X 100)
QUESTION 4
If you have 2.42 L of 1.09 MK2CrO 4 solution, calculate the grams of solute present: (find moles of
K2Cro4 present, then convert to grams)

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.