Bellringers Phases of MATTER UNIT

Phases of Matter Unit Monday, October 17, 2011 Objective: SWBAT describe the four states of matter and how it relates to thermal/kinetic energy. BR: What are the states of matter? What is the difference at the molecular level between a gas and a solid? Lesson: 1.Pass out green picture of phase changes (CHANGE ARROW on DEPOSITION) 2.Intro to States of Matter notes 3.Go over pg 78 #1-6 (talk as a group and then share out) 4.Front of States of Matter wksht HW: Reinforcement sheet

Phases of MATTER Unit Tuesday, October 18 Objective: SWBAT compare and contrast exo and endothermic reactions. BR: 1. What does the prefix endo- mean? What does exo- mean? Lesson: 1.Notes on exo and endothermic reactions 2.It doesn’t phase me 3.Hot/Cold Pack HW:

Wednesday, October 19 Objective: SWBAT interpret a phase change graph and explain how intermolecular forces are involved in a phase change. BR: What must happen to change a solid to a liquid? (write what you know now then come back at the end of class and add to it!) Lesson: 1.Go over test(s) 2.Notes on IF’s HW:

Thursday, October 20 Objective: SWBAT- same as Wed. BR: 1. Describe what is happening when a glass of water “sweats” Lesson: 1.Finish Notes on Phase change graphs (and simultaneously go over -It doesn’t phase me graphs) HW: Phase Change WS (paragraph with fill ins)

FRIDAY HAD A SUB- Watched a matter of state and did both green phase change graph ws’s

Monday October 24 Objective: SWBAT calculate molecular mass of compounds. BR: How much does an atom of Carbon “weigh”? How much do 3 atoms of Carbon weigh? How many carbon atoms are there in glucose C 6 H 12 O 6 )? Lesson: 1.Go over BR 1.Atomic number, mass 2.“Notes” on Molecular Mass wksht HW: Read Lab and do Pre-lab Questions

Molecular Mass Answers Practice Problems: Find the molecular weight of the following molecules. Show your work! 1. NaCl = = 588. Ba(OH) 2 = 137+ (2x16) + (2x1)= KOH = 569. C 4 H 10 = H 2 O = CH 4 = N 2 = C 12 H 22 O 11 = C 6 H 14 = H 2 SO 4 = HCl = SbCl 3 = SO 2 = P 2 O 5 = 142

EXTENSION: Determine the molecular mass of the following compounds. Be sure to show your work: 1. Al(NO 3 ) 3 2. Al 2 (SO 4 ) BaCrO 4 4. NaHCO Fe(NO 3 ) 3 (H 2 O) 9

Determine the molecular mass of the following compounds. Be sure to show your work: 1. Al(NO 3 ) 3 = 27+(14x3)+(16 x 9)=213 amu 2. Al 2 (SO 4 ) 3 = (2x27)+(32x3)+(16 x 12)=342 amu 3. 5 BaCrO 4 = 5( (16 x 4))= 1265 amu 4. NaHCO 3 = (16x3)=213 amu 5. 3 Fe(NO 3 ) 3 (H 2 O) 9 = 3(56 +(14x3) + (16x18) + (1x18)) = 1212 amu

Phases of Matter Unit Tuesday, October 25, 2011 Objective: SWBAT explain how intermolecular forces affect evaporation rates. BR: Put the following in order of what would evaporate fastest to slowest: – Low Molecular Mass with High IF’s – Low Molecular Mass with Low IF’s – High Molecular Mass with High IF’s Lesson: 1.Evaporation Lab HW: Finish Lab

Evaporation Rates HIGH EVAPORATION RATES will be recognized by a BIG change in temperature Molecules that evaporate quickly will have – LOW MOLECULAR MASS and – LOW/(WEAK) IF’s – (remember that evaporation is an ENDOTHERMIC process and will therefore take energy AWAY from the thermometer

Evaporation Rates SLOW EVAPORATION RATES will be recognized by a SMALL change in temperature Molecules that evaporate slowlly will have – HIGH MOLECULAR MASS and – HIGH/(STRONG) IF’s – (remember that evaporation is an ENDOTHERMIC process and will therefore take energy AWAY from the thermometer

Chemical Formulas for Evaporation Lab Water- H 2 O Isopropyl Alcohol- C 3 H 7 OH Pentanol- C 5 H 11 OH Pentane- C 5 H 12

Wednesday October 26 Objective: SWBAT explain how intermolecular forces affect evaporation rates. BR: (only write what is underlined) Read analysis question #2 from the lab. Summarize in a few points : How would you determine if a molecule has H bonds? (what are some clues) Lesson: 1.Go over BR 2.Go over evaporation lab 3.Evap Lab Review Sheet 4.Clicker/Review HW: Review for test!!!

Thursday, October 27 Objective: SWBAT review BR: 1.? Lesson: 1.Study Guide HW: REVIEW!!!

Friday, October 28 TEST DAY