Calculate the heat of reaction of the following reaction : C6H12O6(s)

1.	Calculate the heat of reaction of the following reaction : C6H12O6(s) + 6O2(g) → 6CO2(g) + 6H2O(g) ; ΔH = ? C(graphite) + O2(g) → CO2(g); ΔH = -395.0 kJ ....(1)H2(g) + O(g) → H2O(l); ΔH = -269.5 kJ ....(2)6C(graphite) + 6H2(g) + O2(g) → C6H12O6; ΔH = -1169.8 kJ .....(3)
Answer» Multiplying equation (1) and (2) each by 6 reversing (3), we get, 6C_(graphite) + 6O_2(g) → 6CO_2(g); ΔH = -2370 kJ …(4) 6H_2(g) + 3O_2(g) → 6H₂O(l); ΔH = -1616.4 kJ … (5) C₆H₁₂O_6(s) → 6C_(graphite) + 3O_2(g) ; ΔH = +1169.8 kJ …..(6) Adding (4), (5) and (6), C₆H₁₂O_6(s) +6O_2(g) → 6CO_2(g) +6H₂O_(g) ; ΔHg (C₆H₁₂O₆) = -2370.0 – 1616.4 + 1169.8 = -2816.6 k

Calculate the heat of reaction of the following reaction : C6H12O6(s) + 6O2(g) → 6CO2(g) + 6H2O(g) ; ΔH = ? C(graphite) + O2(g) → CO2(g); ΔH = -395.0 kJ ....(1)H2(g) + O(g) → H2O(l); ΔH = -269.5 kJ ....(2)6C(graphite) + 6H2(g) + O2(g) → C6H12O6; ΔH = -1169.8 kJ .....(3)

Answer»

Multiplying equation (1) and (2) each by 6 reversing (3), we get,

6C_(graphite) + 6O_2(g) → 6CO_2(g); ΔH = -2370 kJ …(4)

6H_2(g) + 3O_2(g) → 6H₂O(l); ΔH = -1616.4 kJ … (5)

C₆H₁₂O_6(s) → 6C_(graphite) + 3O_2(g) ; ΔH = +1169.8 kJ …..(6)

Adding (4), (5) and (6),

C₆H₁₂O_6(s) +6O_2(g) → 6CO_2(g) +6H₂O_(g) ;

ΔHg (C₆H₁₂O₆) = -2370.0 – 1616.4 + 1169.8 = -2816.6 k

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Calculate the heat of reaction of the following reaction : C6H12O6(s) + 6O2(g) → 6CO2(g) + 6H2O(g) ; ΔH = ? C(graphite) + O2(g) → CO2(g); ΔH = -395.0 kJ ....(1)H2(g) + O(g) → H2O(l); ΔH = -269.5 kJ ....(2)6C(graphite) + 6H2(g) + O2(g) → C6H12O6; ΔH = -1169.8 kJ .....(3)

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