{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

CHM 139 - Norman - Exam II

# CHM 139 - Norman - Exam II - (Circle one I give my...

This preview shows pages 1–2. Sign up to view the full content.

(Circle one) I give my permission for the public return of this exam. YES NO Chemistry 139 Name (printed) Exam 2 100 points Signature Fall 2007 Student Number Useful?: density of water = 1.00 g/mL P 1 = X 1 P 1 o (P + (n 2 a/V 2 ))(V – nb) = nRT R = 0.0821 L . atm/mol . K = 8.314 J/mol . K; P tot = Σ P i 1 atm = 760 torr K = 273 + o C Δ T f,b = K f,b m c π = M c RT P gas = k H M gas k H = 29 atm/M for CO 2 in water; For H 2 O: K b = 0.52 K/m c ; K f = 1.86 K/m c ; density = 1.00 g/mL; specific heat of liquid = 4.184 J/g•K Δ H (fus) = 6.008 kJ/mol; Δ H (vap) = 44.02 kJ/mol; specific heat of solid, 2.092 J/g•K k = Ae -Ea/RT ; ln k = ln A - Ea/RT; If N = A/B, then log N = log A - log B [A] = [A] 0 - kt; 1/[A] = kt + 1/[A] o ; ln[A] = ln[A] o - kt; t 0.5 = [A] 0 /2k; t 0.5 = 0.693/k; ln k 2 k 1 = E a R 1 T 1 - 1 T 2 x = - b ± b 2 - 4ac 2a t 0.5 = 1/k[A] 0 If N = A b , then log N = b log A Multiple choice (2 pts ea.) PLACE THE BEST ANSWER IN THE SPACE PROVIDED!!! 1. Molality is defined as . (A) moles of solute in 1 liter of solution (B) grams of solute in 1 liter of solvent (C) moles of solute in 1 kg of solvent (D) grams of solute in 1 kg of solvent (E) moles of solute in 1 liter of solvent (F) grams of solute in 1 liter of solution (G) moles of solute in 1 kg of solution (H) grams of solute in 1 kg of solution (I) number of children in 1 chemist’s family (J) the number of industrial spies at Dupont 2. When the vapor pressure of a liquid equals the external pressure, the liquid . (A) freezes (B) boils (C) sublimes (D) condenses (E) disappears (F) apparates

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

### Page1 / 5

CHM 139 - Norman - Exam II - (Circle one I give my...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document
Ask a homework question - tutors are online