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The compound cyclohexanol, C,H1,0, is a good fuel. It is a liquid at ordinary temperatures. When the liquid is burned, the reaction involved is 2 C,H120(8) + 17 O2(g} →12 CO2(g) + 12 H,0(g) The standard enthalpy of formation of liquid cyclohexanol at 25 °C is -348.2 kJ mol'; other relevant enthalpy of formation values in kJ mol"' are: C,H120(g) = -286.2 ; CO2(g)= -393.5 ; H2O(g) =-241.8 (a) Calculate the enthalpy change in the burning of 5.000 mol liquid cyclohexanol to form gaseous products at 25°C. State explicitly whether the reaction is endothermic or exothermic. AH° = kJ (b) Would more or less heat be evolved if gaseous cyclohexanol were burned under the same conditions? What is the standard enthalpy change for vaporizing 5.000 mol C,H120(,) at 25°C? ΔΗ kJ Calculate the enthalpy change in the burning of 5.000 mol gaseous cyclohexanol to form gaseous products at 25°C. AH° = kJ

The compound cyclohexanol, C,H1,0, is a good fuel. It is a liquid at ordinary temperatures. When the liquid is burned, the reaction involved is 2 C,H120(8) + 17 O2(g} →12 CO2(g) + 12 H,0(g) The standard enthalpy of formation of liquid cyclohexanol at 25 °C is -348.2 kJ mol'; other relevant enthalpy of formation values in kJ mol"' are: C,H120(g) = -286.2 ; CO2(g)= -393.5 ; H2O(g) =-241.8 (a) Calculate the enthalpy change in the burning of 5.000 mol liquid cyclohexanol to form gaseous products at 25°C. State explicitly whether the reaction is endothermic or exothermic. AH° = kJ (b) Would more or less heat be evolved if gaseous cyclohexanol were burned under the same conditions? What is the standard enthalpy change for vaporizing 5.000 mol C,H120(,) at 25°C? ΔΗ kJ Calculate the enthalpy change in the burning of 5.000 mol gaseous cyclohexanol to form gaseous products at 25°C. AH° = kJ

Chemistry: Matter and Change
Chemistry: Matter and Change
1st Edition
ISBN:9780078746376
Author:Dinah Zike, Laurel Dingrando, Nicholas Hainen, Cheryl Wistrom
Publisher:Dinah Zike, Laurel Dingrando, Nicholas Hainen, Cheryl Wistrom
Chapter15: Energy And Chemical Change
Section: Chapter Questions
Problem 112A: sample of natural gas is analyzed and found to be88.4% methane (CH4) and 11.6% ethane (C2H6) bymass....
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The compound cyclohexanol, C,H1,0, is a good fuel. It is a liquid at ordinary temperatures. When the liquid is burned, the reaction involved is 2 C,H120(8) + 17 O2(g} →12 CO2(g) + 12 H,0(g) The standard enthalpy of formation of liquid cyclohexanol at 25 °C is -348.2 kJ mol'; other relevant enthalpy of formation values in kJ mol"' are: C,H120(g) = -286.2 ; CO2(g)= -393.5 ; H2O(g) =-241.8 (a) Calculate the enthalpy change in the burning of 5.000 mol liquid cyclohexanol to form gaseous products at 25°C. State explicitly whether the reaction is endothermic or exothermic. AH° = kJ (b) Would more or less heat be evolved if gaseous cyclohexanol were burned under the same conditions? What is the standard enthalpy change for vaporizing 5.000 mol C,H120(,) at 25°C? ΔΗ kJ Calculate the enthalpy change in the burning of 5.000 mol gaseous cyclohexanol to form gaseous products at 25°C. AH° = kJ
Transcribed Image Text:The compound cyclohexanol, C,H1,0, is a good fuel. It is a liquid at ordinary temperatures. When the liquid is burned, the reaction involved is 2 C,H120(8) + 17 O2(g} →12 CO2(g) + 12 H,0(g) The standard enthalpy of formation of liquid cyclohexanol at 25 °C is -348.2 kJ mol'; other relevant enthalpy of formation values in kJ mol"' are: C,H120(g) = -286.2 ; CO2(g)= -393.5 ; H2O(g) =-241.8 (a) Calculate the enthalpy change in the burning of 5.000 mol liquid cyclohexanol to form gaseous products at 25°C. State explicitly whether the reaction is endothermic or exothermic. AH° = kJ (b) Would more or less heat be evolved if gaseous cyclohexanol were burned under the same conditions? What is the standard enthalpy change for vaporizing 5.000 mol C,H120(,) at 25°C? ΔΗ kJ Calculate the enthalpy change in the burning of 5.000 mol gaseous cyclohexanol to form gaseous products at 25°C. AH° = kJ
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