Calculate the standard enthalpy change in a reaction? PbO(s) + CO(g) = Pb(s)+ CO2(g). .

Question

The standard enthalpies of formation of PbO, CO and CO2 are -219, -111and -394 KJ mol-1 respectively.

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Answer 1 · 2018-03-30T00:24:03

#-64 " kJ mol"^(-1)#

#∆H°="np∆H°product-nr∆H°reactant"#

Data:
#H°PbO➡-219 kJmol^(-1)#
#H°CO➡ -111 kJmol^(-1)#
#H°CO₂ ➡ -394 kJmol^(-1)#
#H°Pb➡ 0 kJmol^(-1)#

∴solution;
#∆H°= "∑∆H°products" -"∑∆H°reactants" #
# = [(0)+(-394)-(-219)+(-111)]#
# = [(-394)-(-330)#
# = -64 kJmol^(-1)#