ThermochemistryHard
Question
Consider the following reactions :
C (s) + O2 (g) → CO2 (g) + x kJ
CO (g) +
O2 (g) → CO2 (g) + y kJ
The heat of formation of CO (g) is :
C (s) + O2 (g) → CO2 (g) + x kJ
CO (g) +
O2 (g) → CO2 (g) + y kJThe heat of formation of CO (g) is :
Options
A.- (x + y) kJ / mol
B.(x - y) kJ / mol
C.(y - x) kJ / mol
D.None of these
Solution
C(s) + O2(g) → CO2(g);
ᐃrH1 = - x kJ/mol .....(1)
CO(g) + 1/2O2(g) → CO2(g)
ᐃH2 = - y kJ/mole so, C(s) +
O2 (g) → C(g) ᐃH = y - x
ᐃrH1 = - x kJ/mol .....(1)
CO(g) + 1/2O2(g) → CO2(g)
ᐃH2 = - y kJ/mole so, C(s) +
O2 (g) → C(g) ᐃH = y - x Create a free account to view solution
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