35. Solving a chemistry problem
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- For reactions C(graphite) CO2(g)=2CO(g)
C(graphite) H2O(g)=CO(g) H2(g)
thermal effects at constant pressure and 500 K are respectively 173.6 and 133.9 kJ. Calculate the thermal effect of the reaction
CO (g) H2O (g) = CO2 (g) H2 (g)
at 1000 K, if the molar heat capacities in the range 298-1500 K are equal:
Cp CO = 28.41 4.10*10-3 T – 0.46*105 T-2 J/(mol*K);
Cp H2O(g) = 30.00 10.71*10-3 T 0.33*105 T-2 J/(mol*K);
Cp CO2 = 44.14 9.04*10-3 T – 8.53*105 T-2 J/(mol*K);
Cp H2= 27.28 3.26*10-3 T 0.502*105 T-2 J/(mol*K).
Answer: –34.92 kJ.
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