If there is a decrease in the number of moles of gas during an exothermic chemical reaction that is performed at constant pressure, then it can be said that... A) AH is smaller than AE because the volume of the system decreases. B) AH is larger than AE because the volume of the system increases. C) AH is larger than AE because the volume of the system decreases. D) AH is smaller than AE because the volume of the system increases. E) AH is identical to AE. 3. Consider the following ratio: P₁ Ptotal where P is the partial pressure of gasi in a mixture, and Ptotal is the total pressure of the mixture. (Assume that all gases behave ideally.) Why is P/ Ptotal equal to the mole fraction of that gas? A) Pressure is measured in units of moles per litre. B) Pressure and density are inversely proportional. C) All of the gas molecules in the mixture have the same kinetic energy. D) All of the gas molecules in the mixture effuse at the same rate. E) Pressure and moles are directly proportional. ot

If there is a decrease in the number of moles of gas during an exothermic chemical reaction that is performed at constant pressure, then it can be said that... A) AH is smaller than AE because the volume of the system decreases. B) AH is larger than AE because the volume of the system increases. C) AH is larger than AE because the volume of the system decreases. D) AH is smaller than AE because the volume of the system increases. E) AH is identical to AE. 3. Consider the following ratio: P₁ Ptotal where P is the partial pressure of gasi in a mixture, and Ptotal is the total pressure of the mixture. (Assume that all gases behave ideally.) Why is P/ Ptotal equal to the mole fraction of that gas? A) Pressure is measured in units of moles per litre. B) Pressure and density are inversely proportional. C) All of the gas molecules in the mixture have the same kinetic energy. D) All of the gas molecules in the mixture effuse at the same rate. E) Pressure and moles are directly proportional. ot

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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