# Problem: Using data tabulated below, calculate ΔG r° at 25°C for C2H4 (g) + 3 O2 (g) → 2 CO2 (g) + 2 H2O (l). Species      ΔHf° (kJ mol –1)       S° (J K –1 mol –1)      ΔGf° (kJ mol –1) C2H4(g)            52.26                         219.45                  68.12 CO2(g)           –393.51                       213.63               –394.36 H2O(l)            –285.83                         69.91                –237.18 O2(g)                                                  205.03 a) 1314.0 kJ  b) –699.7 kJ  c) –1195.0 kJ  d) –1314.0 kJ  e) –1331.2 kJ

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Using data tabulated below, calculate ΔG r° at 25°C for

C2H(g) + 3 O(g) → 2 CO(g) + 2 H2O (l).

Species      ΔHf° (kJ mol –1)       S° (J K –1 mol –1)      ΔGf° (kJ mol –1)

C2H4(g)            52.26                         219.45                  68.12

CO2(g)           –393.51                       213.63               –394.36

H2O(l)            –285.83                         69.91                –237.18

O2(g)                                                  205.03

a) 1314.0 kJ

b) –699.7 kJ

c) –1195.0 kJ

d) –1314.0 kJ

e) –1331.2 kJ

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