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); DH = -395.0 kJ … (1) H2(g) + O2(g) → H2O(l); DH = -269.5 kJ … (2) 6C(graphit.e) + 6H2(g) + O2(g) → C6H12O6(s); DH = -1169.8 kJ … (3)
Answer» Multiplying equation (1) and (2) each by 6 reversing (3), we get, 6C_(graphite) + 6O₂(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) + 6H_2(g) + 3O_2(g) ; ΔH = +1169 - 8 kJ …. (6) Adding (4), (5) and (6), C₆H₁₂O_6(s) + 6O_2(g) → 6CO_2(g) + 6H₂O_(g); AH(C₆H₁₂O₆) = -2370.0 - 1616.4 + 1169,8 = -2816.6 kJ

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

Answer»

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

6C_(graphite) + 6O₂(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) + 6H_2(g) + 3O_2(g) ; ΔH = +1169 - 8 kJ …. (6)

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

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

AH(C₆H₁₂O₆) = -2370.0 - 1616.4 + 1169,8 = -2816.6 kJ

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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); DH = -395.0 kJ … (1) H2(g) + O2(g) → H2O(l); DH = -269.5 kJ … (2) 6C(graphit.e) + 6H2(g) + O2(g) → C6H12O6(s); DH = -1169.8 kJ … (3)

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