**Assignment Questions****1.** A gas expands and does PV work on its surroundings equal to 316 J. At the same time, it absorbs 122 J of heat from the surroundings. Calculate the change in energy of the gas. Note: PV work means work done by a changing volume against constant pressure. Enter your answer in scientific notation.*x10 J***2.** Pentaborane-9 (B5H9) is a colorless, highly reactive liquid that will burst into flames when exposed to oxygen. The reaction is:\[ 2\text{B}_5\text{H}_9(l) + 12\text{O}_2(g) \rightarrow 5\text{B}_2\text{O}_3(s) + 9\text{H}_2\text{O}(l) \]Calculate the kilojoules of heat released per gram of the compound reacted with oxygen. The standard enthalpy of formations of B5H9(l), B2O3(s), and H2O(l) are 73.2, -1271.94, and -285.83 kJ/mol, respectively.*kJ/g released***3.** A quantity of 2.00 x 10^2 mL of 0.785 M HCl is mixed with 2.00 x 10^2 mL of 0.393 M Ba(OH)2 in a constant-pressure calorimeter of negligible heat capacity. The initial temperature of the HCl and Ba(OH)2 solutions is the same at 21.26°C. For the process below, the heat of neutralization is -56.2 kJ/mol. What is the final temperature of the mixed solutions?\[ \text{H}^+(\text{aq}) + \text{OH}^-(\text{aq}) \rightarrow \text{H}_2\text{O}(l) \]**Thank you, I appreciate it!**

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PLEASE ANSWER ALL PARTS 1- A gas expands and does PV work on its surroundings equal to 316 J. At the same time, it absorbs 122 J of heat from the surroundings. Calculate the change in energy of the gas. Note: PV work means work done by a changing volume against constant pressure. Enter your answer in scientific notation. x10J 2- Pentahorano-2 (BEHO)ic colorless highly reactive liquid that will buret into flames when exp The reaction is

PLEASE ANSWER ALL PARTS 1- A gas expands and does PV work on its surroundings equal to 316 J. At the same time, it absorbs 122 J of heat from the surroundings. Calculate the change in energy of the gas. Note: PV work means work done by a changing volume against constant pressure. Enter your answer in scientific notation. x10J 2- Pentahorano-2 (BEHO)ic colorless highly reactive liquid that will buret into flames when exp The reaction is

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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