11. Start level 3 of the balancing equation game. Take turns and write down the equations as you solve them, along with any new strategies you needed for balancing. CHALLENGE QUESTIONS: BALANCE THE EQUATIONS BELOW.

A. ___ NaNO3 + ___ PbO  ___ Pb(NO3)2 + ___ Na2O

B. ___ Ca3P2 + ___ H2O  ___Ca(OH)2 + ___ PH3

C. ___Fe2O3 + ___ CO  ___Fe + ___ CO2

D. ___NH3 + ___ O2  ___ NO2 + ___ H2O

E. ___FeS + ___O2  ___Fe2O3 + ___SO2

F. ___ C3H6O2 + ___ O2  ___ CO2 + ___ H2O

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.

po-215 i got it right on the quiz

i don't know people like to fight everywhere rip.