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

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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Given the standard enthalpies of formation for the following substances, determine the reaction enthalpy for the following reaction. AGran =? kJ 4A (g) + 2B (3) → 1C (g)+ 7D (g) AGi in kJ/mol Substance A (g) B (g) C(g) D (g) 76.34 + 5.24 - 55.86 - 14.55 O - 452.59 kJ/mol O + 452.59 kJ/mol O + 137.17 kJ/mol O - 141.51 kJ/mol O - 137.17 kJ/mol
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