Question

1. The standard enthalpy of formation of CO(g) is −111 kJ/mol

   [refer to this equation C(s) + 1/2O2(g) ⟶ CO(g)]

   What is the ΔH^o_rxn of this reaction? (What is the standard enthalpy change of this reaction?)

   2C(s) + O2(g) ⟶ 2CO(g)

   		-253 kJ/mol
   		- 222 kJ/mol
   		-97.1 kJ/mol
   		534 kJ/mol
   		124.9 kJ/mol
   		-50.5 kJ/mol

5 points   

QUESTION 2

1. (assume A, B, C, and D and E are chemicals)

   Look at these equations

   A +  B à  C        ΔH° = -9 kJ/mol rxn

   C  à  D + E      ΔH° = -10 kJ/mol rxn

   What is standard enthalpy change for this reaction?

   A +  B à  D + E  

   		-25 kJ/mol rxn
   		- 22 kJ/mol rxn
   		-97 kJ/mol rxn
   		-19 kJ/mol rxn
   		41 kJ/mol  rxn
   		- 3 kJ/mol rxn

Answer 1

solution clo+102(9) - Cocg. DH =-111kJ/mol 0 So if we multiply by a dmis an extensive property & so it also gets multiplied 8C(s) + O2(g) → 2C019) Horn -11172 = -222 KJ/MOL A + B C DH=-9 kulmol o C APE DHE -10 221 ☺ So A + B = 0+€ { by adding 010} - Dhaxna (AH) + (OH), --9-10 kJ/mol = -19 kJ/mol