How do you find the limiting reactant if 2.50 mol copper and 5.50 mol silver nitrate react by single displacement?

The limiting reagent is Copper (Cu).

Explanation:

The balanced equation is:

                      Cu + 2AgNO3 -----> Cu(NO3)2 + 2Ag

                        = 2.75 mol Cu.

Since there are only  2.50 mol Cu, copper is the limiting reactant, because, with that quantity of copper, only  2.50 mol AgNO3 will be reacted.

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.

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explanation: