C6H5OH(s) + 7 O2(g) ---> 6 CO2(g) + 3H₂O(1) H When a 2.000-gram sample of pure phenol, C6H5OH(s), is completely burned according to the equation above, 64.98 kilojoules of heat is released. Use the information in the table below to answer the questions that follow. Standard Heat of Substance Formation, AHᵒf, at 25°C (kJ/mol) C(graphite) CO₂(g) H₂(g) H₂O(1) O₂(g) C6H5OH(s) 0.00 -395.5 0.00 -285.85 0.00 ? Absolute Entropy, Sº, at 25°C (J/mol-K) 5.69 213.6 130.6 69.91 205.0 144.0 01 (a) Calculate the molar heat of combustion of phenol in kilojoules per mole at 25°C. (b) Calculate the standard heat of formation, AHᵒf, of phenol in kilojoules per mole at 25°C. plastov (0) (c) Calculate the value of the standard free-energy change, AG° for the combustion of phenol at 25°C.

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C6H5OH(s) + 7 O2(g) ---> 6 CO2(g) + 3H₂O(1)
When a 2.000-gram sample of pure phenol, C6H5OH(s), is completely burned according to the equation above,
64.98 kilojoules of heat is released. Use the information in the table below to answer the questions that follow.
Standard Heat of
Substance Formation, AHºf,
at 25°C (kJ/mol)
C(graphite)
CO₂(g)
H₂(g)
H₂O(1)
O₂(g)
C6H5OH(s)
Absolute Entropy, Sº,
at 25°C (J/mol-K)
0.00f 5.69
213.6
130.6
69.91
205.0
144.0
-395.5w
0.00
-285.85
0.00
?
070107
(0042 (5
(O
(a) Calculate the molar heat of combustion of phenol in
kilojoules per mole at 25°C.
(b) Calculate the standard heat of formation, AH°f, of
phenol in kilojoules per mole at 25°C.
166
(c) Calculate the value of the standard free-energy change, AG° for the combustion of phenol at 25°C.
Transcribed Image Text:C6H5OH(s) + 7 O2(g) ---> 6 CO2(g) + 3H₂O(1) When a 2.000-gram sample of pure phenol, C6H5OH(s), is completely burned according to the equation above, 64.98 kilojoules of heat is released. Use the information in the table below to answer the questions that follow. Standard Heat of Substance Formation, AHºf, at 25°C (kJ/mol) C(graphite) CO₂(g) H₂(g) H₂O(1) O₂(g) C6H5OH(s) Absolute Entropy, Sº, at 25°C (J/mol-K) 0.00f 5.69 213.6 130.6 69.91 205.0 144.0 -395.5w 0.00 -285.85 0.00 ? 070107 (0042 (5 (O (a) Calculate the molar heat of combustion of phenol in kilojoules per mole at 25°C. (b) Calculate the standard heat of formation, AH°f, of phenol in kilojoules per mole at 25°C. 166 (c) Calculate the value of the standard free-energy change, AG° for the combustion of phenol at 25°C.
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