3/12/2012 Standards: 4 (Gases & Their Properties) Objectives: ● Complete Dalton's Law Lab ● Introduce PV = nRT (R = constant which = ) DO NOW: 1. Read: Dalton's Law Lab - (computer) Std 4 2. Complete Dalton's Law lab (all calcs) (10 pts) Std 4 HOMEWORK: 1. SN Ch 14.2, p (2 pts) Std 4 2. Ch PP's, p (3 pts) Std 4 ========================================================== BASKET: ● Journal 3/9 1. Gay-Lussak, p (show given, find, calcs) 3 pts Std 4 2. Boyles's Law Worksheet (handout) - Show given, find, & calcs - 5,6,7 (a&b), 9 (a&b),11 (a&b),17 (a&b),19 (a&b), and 21 (5 pts) Std 4

R =

3/13 & 3/14/2012 Standards: 4 (Gases & Their Properties) CAHSEE Objectives: ● Review results of Dalton's Law Lab w responder quiz ● Students will be able to decide whether to use PV = nRT or combined. ● Students will be able to use STP in calculations DO NOW: 1. Ch 14.2, p PP's (be able to show given & find) HOMEWORK: 1. Ch 14.2, p PP's 22 & 23, p PP's (5 pts) Std 4 =========================================================== STAMPS: ● Journal 3/9 & 3/12 Dalton's Law Lab- you may be asked to read yours 1. SN Ch 14.2, p (2 pts) Std 4 2. Ch PP's, p (3 pts) Std 4

For homework turned in Monday There were 2 assignments. The paper on top has score for both assignments: 5 pts for Boyle's Law worksheet 3 pts for Gay-Lussak problems from book Total = 8

PV = nRT (R = constant which = ) P 1 V 1 P 2 V 2 n 1 T 1 n 2 T 2 = Combined Gas Law - conditions change Ideal Gas Law - only one set of conditions

STP means P = 1 atm T = 0.00 deg C Important relative: If gas is at STP 22.4L = 1 mol

3/14/2012 Standards: 4 (Gases & Their Properties) CAHSEE If you are in Periods 2 or 6, you will need to look at the whiteboard for 3/13

3/15/2012 Standards: 4 (Gases & Their Properties) Objectives: ● Comlete Mini-Lab - Disc. direct & inv. relationships P,V,n & T ● Be able to complete Boyle's Law lab on computer at home. ● Students will be able to use STP in their calculations. ● Students will be able to complete Extra Credit gas sim (see Labs) (30 pts) DO NOW: 1.If 852 Torr, and 85 g HCl, and 45 °C, what will the volume of HCl gas be in the vessel? Show your calculations for each of the 3 conversions as well as using PV = nRT or Combined Gas Laws. HOMEWORK: 1. Ch 14.3, (5 pts) Std 4 ============================================================ STAMPS: ● Journal 3/14 1. Ch 14.2, p PP's 22 & 23, p PP's (5 pts) Std 4 HELP for DO NOW Pressure must be converted to atm., g HCl must be converted to moles, 45 °C must be converted to Kelvins, and the value of R (a constant) is always = Then V will be given in L.

Notebook total is now 182 possible

PV = nRT (R = constant which = ) P 1 V 1 P 2 V 2 n 1 T 1 n 2 T 2 = Combined Gas Law - conditions change Ideal Gas Law - only one set of conditions

STP means P = 1 atm T = 0.00 deg C Important relative: If gas is at STP 22.4L = 1 mol

For today's quiz questions, first form groups of 4, then one person goes to get a responder to give the answers for each question and explain why the answer is correct.

1Why are the the pressure calculations coming out the same for molecules of different sizes? A molar mass is part of PV = nRT B they aren't, mass of molecule matters C lighter molecules hit side of container more often than heavier molecules, resulting in their exerting the same amount of pressure on the inside of the container D pressure of all gases is constant and doesn't change

2If you have 1 mol ea of 5 different molecules, how much more pressure (P) will the 5 exert together than only one? A 2 times more P B 5 times more P C this cannot be determined with gas laws D 3 times more P

3Does the molecule mass affect the pressure it will exert on the inside of the vessel it is in? Yes No

4Using PV = nRT, calculate the pressure of 1 mol of CH in a vessel of 30L, at a temp. of 100 deg C. (R = ). Round to 3 sig. figs

5Given the conditions shown, which gas law will you need to use? (problems from text) A Combined Gas Law B Ideal Gas Law p , 33 p. 432

3/16/2012 Standards: 4 Objectives: ● Students will be able to complete Boyle's Law gas sim questions at home. ● Students will be able to use STP in their calculations. ● Students will understand how to use the extra credit on-line gas sim. and be able to ask questions about how to accomplish the assignment due 3/30 (2 wks from today) DO NOW: 1.If P = 705 Torr; V = 85 mL; T = 115 °C. Find moles of gas. 2. If the gas is methane CH 4, how many grams will that be? HOMEWORK: 1. Ch 14.2 PP's p (10 pts) Std 4 2. Do Boyles' Law lab at home using simulator on-line. Follow directions given on the sheet itself and instruction given in class today. NOTE - THIS ISN'T DUE UNTIL TUESDAY! (15 pts) Std 4 ========================================================== STAMPS: ● Journal 3/15 1. Ch 14.2, p (5 pts) Std 4 S TP – is code for P = 1 atm and T = 273 K Period 3 notebooks collected today Period 5 and 6 notebooks collected Monday

Notebook total is now 182 possible