In which of the following processes is AH = AU? A. Two moles of ammonia gas are cooled from 325°C to 300°C at 1.2 atm. B. One gram of water is vaporized at 100°C and 1 atm. C. Two moles of hydrogen iodide gas react to form hydrogen gas and iodine gas in a 40-L container. D. Calcium carbonate is heated to form calcium oxide and carbon dioxide in a container with variable volume. E. One mole of solid carbon dioxide sublimes to the gas phase. B E

In which of the following processes is AH = AU? A. Two moles of ammonia gas are cooled from 325°C to 300°C at 1.2 atm. B. One gram of water is vaporized at 100°C and 1 atm. C. Two moles of hydrogen iodide gas react to form hydrogen gas and iodine gas in a 40-L container. D. Calcium carbonate is heated to form calcium oxide and carbon dioxide in a container with variable volume. E. One mole of solid carbon dioxide sublimes to the gas phase. B E

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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