Exam04answers pg4

# Exam04answers pg4 - 1 He(g 2 atm He(g 10 atm 2 O2(g O2(aq 3...

This preview shows page 1. Sign up to view the full content.

1. He(g, 2 atm) He(g, 10 atm) 2. O 2 (g) O 2 (aq) 3. H 2 (g) + I 2 (s) 2HI(g) correct 4. 2Ag(s) + Br 2 ( lscript ) 2AgBr(s) 5. 2NO 2 (g) N 2 O 4 (g) Explanation: 011 (part 1 of 1) 10 points In a system at equilibrium at constant tem- perature and pressure, Δ H is necessarily equal to 1. Δ U. 2. Δ G. 3. T Δ S. correct 4. P Δ V. 5. 0. Explanation: Δ G = 0 for a system at equilibrium, so Δ G = Δ H - T Δ S 0 = Δ H - T Δ S Δ H = T Δ S 012 (part 1 of 1) 8 points The process of water freezing to form ice at 0 C is 1. an endothermic phase change. 2. an exothermic chemical reaction. 3. an exothermic phase change. correct 4. neither exothermic nor endothermic. 5. an endothermic chemical reaction. Heat must be removed from the water for it to freeze. This is exothermic. 013 (part 1 of 1) 12 points In the isothermal compression of 66.0 mmol of a perfect gas at 327 K, the volume of the gas is reduced to 12.0% of its initial value. Calculate w for this process.
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

### What students are saying

• As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

Kiran Temple University Fox School of Business ‘17, Course Hero Intern

• I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

Dana University of Pennsylvania ‘17, Course Hero Intern

• The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

Jill Tulane University ‘16, Course Hero Intern