Announcements Exam #1: Tuesday, September 24th, 7:00-8:15pm, locations on the course website Conflict Exam: 5:15-6:30pm, 103 Transportation Bldg, sign up outside of 101 CA until noon on 9/24

Q & A Review Sessions

Published Recently… “U.S. companies largely favor graduates of big state universities over Ivy League and other elite liberal-arts schools when hiring to fill entry-level jobs, a Wall Street Journal study found. In the study—which surveyed 479 of the largest public and private companies, nonprofits and government agencies—Pennsylvania State University, Texas A&M University and the University of Illinois at Urbana-Champaign ranked as top picks for graduates best prepared and most able to succeed.” By: Jennifer Merritt http://online.wsj.com/article/SB10001424052748703597204575483730506372718.html

Still Due This Week: Online HW #3 (Type 2) due Wednesday by 7:00 p.m. Lab write-up for Gases Lab due Wednesday at the start of lab Review Questions for Exam 1 due Friday by 5:00 p.m. (online) Text HW due Friday (assigned by TA)

Clicker #1 0°C to 40°C is double the temperature of 0°C to 20°C. Does this mean you have twice the amount of kinetic energy in your system? A) Yes. If the temperature doubles then the kinetic energy must also double. They are directly related. B) No. Temperature is related to the heat energy of the gas particles, not the kinetic energy of the gas particles. C) No. Temperature is related to the kinetic energy of the gas particles but must be in relationship to the kelvin scale.

Clicker #2 A gas occupies a volume of 0.400 L at 0.661 atm. What will be its volume, at constant temperature, if the pressure is changed to 0.329 atm? Before any calculations are made, do you predict that the volume will increase, decrease, or stay the same? A) increase B) decrease C) stay the same

Clicker #3 Given 6.0 L of nitrogen gas at –25oC, what volume will the nitrogen occupy at 72oC? (Assume constant pressure.) Before any calculations are made, do you predict that the volume will increase, decrease, or stay the same? A) increase B) decrease C) stay the same

Determine the size of a balloon filled with 4. 00 moles of helium gas Determine the size of a balloon filled with 4.00 moles of helium gas. Room conditions are 1.00 atm and 22oC.