A sample of pure solid naphthalene (C1,Hg) weighing 0.6410 g is burned completely with oxygen to CO2(g) and H,O(€) in a constant-volume calorimeter at 25°C. The amount of heat evolved is observed to be 25.79 kJ. (a) Write and balance the chemical equation for the com- bustion reaction. (b) Calculate the standard change in internal energy (AU°) for the combustion of 1.000 mol naphthalene to CO2(g) and H,O(€). (c) Calculate the standard enthalpy change (AH°) for the same reaction as in part (b). (d) Calculate the standard enthalpy of formation per mole of naphthalene, using data for the standard enthalpies of formation of CO2(g) and H,O(€) from Appendix D.

A sample of pure solid naphthalene (C1,Hg) weighing 0.6410 g is burned completely with oxygen to CO2(g) and H,O(€) in a constant-volume calorimeter at 25°C. The amount of heat evolved is observed to be 25.79 kJ. (a) Write and balance the chemical equation for the com- bustion reaction. (b) Calculate the standard change in internal energy (AU°) for the combustion of 1.000 mol naphthalene to CO2(g) and H,O(€). (c) Calculate the standard enthalpy change (AH°) for the same reaction as in part (b). (d) Calculate the standard enthalpy of formation per mole of naphthalene, using data for the standard enthalpies of formation of CO2(g) and H,O(€) from Appendix D.

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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