Question

Given the equation shown and thermodynamic data in the table, answer the questions below. C5H12 (l) + 8O2 (g) ? 5CO2 (g) + 6H2O (l) Substance | C5H12 (l) | CO2 (g) | H2O (l) ?Hf (kJ/mol) at 298 K | - 173.5 | - 393.5 | -285.8 a) Calculate ?H rxn for the above reaction at 298 K. (2 points) b) Given that ?S rxn = - 416.24 J mol-1 K-1, calculate ?G for the above reaction at 298 K. (2 points) c) Choose the correct range for spontaneity of this reaction (from the 4 choices below) and provide your justification: (1 point) • Spontaneous at all temperatures (A) • Spontaneous only at certain low temperatures (?) • Spontaneous only at certain high temperatures (?) • Never spontaneous (~)"

          Given the equation shown and thermodynamic data in the table, answer the questions below.
C5H12 (l) + 8O2 (g) ? 5CO2 (g) + 6H2O (l)

Substance | C5H12 (l) | CO2 (g) | H2O (l)
?Hf  (kJ/mol) at 298 K | - 173.5 | - 393.5 | -285.8

a) Calculate ?H rxn for the above reaction at 298 K. (2 points)
b) Given that ?S rxn = - 416.24 J mol-1 K-1, calculate ?G  for the above reaction at 298 K. (2 points)
c) Choose the correct range for spontaneity of this reaction (from the 4 choices below) and provide your justification: (1 point)
• Spontaneous at all temperatures (A)
• Spontaneous only at certain low temperatures (?)
• Spontaneous only at certain high temperatures (?)
• Never spontaneous (~)"

Given the equation shown and thermodynamic data in the table, answer the questions below.
C5H12 (l) + 8O2 (g) ? 5CO2 (g) + 6H2O (l)

Substance | C5H12 (l) | CO2 (g) | H2O (l)
?Hf (kJ/mol) at 298 K | - 173.5 | - 393.5 | -285.8

a) Calculate ?H rxn for the above reaction at 298 K. (2 points)
b) Given that ?S rxn = - 416.24 J mol-1 K-1, calculate ?G for the above reaction at 298 K. (2 points)
c) Choose the correct range for spontaneity of this reaction (from the 4 choices below) and provide your justification: (1 point)
• Spontaneous at all temperatures (A)
• Spontaneous only at certain low temperatures (?)
• Spontaneous only at certain high temperatures (?)
• Never spontaneous ( )"

Added by Carlos K.

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