Thermodynamics B/C

User avatar
pikachu4919
Moderator
Moderator
Posts: 509
Joined: December 7th, 2012, 2:30 pm
Division: Grad
State: IN
Location: West [Favorite Fightin' Frenchman!] // H-Town! --> Philly
Contact:

Re: Thermodynamics B/C

Postby pikachu4919 » December 5th, 2017, 8:00 am

Alex-RCHS wrote:
Tesel wrote:
Alex-RCHS wrote:Sounds like a good plan to me. Good luck!

What type of plastic are your beakers made of?


I believe they're polystyrene, but I'm having trouble finding the link to confirm.

Interesting. I wasn’t able to find any polystyrene beakers.


I don’t think plastic beakers can be made out of PS, honestly. If I had to make a guess, the most likely case is that they’re made of HDPE or PETE, maybe a chance it could be made of PC but more likely one of the other two
Carmel HS (IN) '16
Purdue BiolE '20
Nationals 2016 ~ 4th place Forensics


Not throwin' away my shot!
MY CABBAGES!

Purdue WL SciOly Exec Board
http://web.ics.purdue.edu/~scienceo/index.html
https://www.facebook.com/purduescioly

MIT and Princeton 2018 Forensics ES
Assassinator #113

SPP SciO
Member
Member
Posts: 248
Joined: March 24th, 2015, 8:21 am
Division: B
State: NY
Location: Brooklyn
Contact:

Re: Thermodynamics B/C

Postby SPP SciO » December 5th, 2017, 8:04 am

Can anyone clarify rule 3e - specifically, "The top surface of the hole must be less than 12 cm above the inside bottom surface of the beaker" ?

A 250mL beaker is almost 10cm tall, so to be within 12cm of the bottom means the "lid" of the device is necessarily very thin, yes? Or am I misreading this? Was looking at a prototype which had the beaker situated in the middle of a 20cm cube, but after re-reading this rule I don't think it would be allowed... Are there any diagrams posted somewhere?
Coach
MS 821 Sunset Park Prep
http://www.sppscio.com

User avatar
pikachu4919
Moderator
Moderator
Posts: 509
Joined: December 7th, 2012, 2:30 pm
Division: Grad
State: IN
Location: West [Favorite Fightin' Frenchman!] // H-Town! --> Philly
Contact:

Re: Thermodynamics B/C

Postby pikachu4919 » December 5th, 2017, 8:05 am

Alex-RCHS wrote:
Tesel wrote:
Alex-RCHS wrote:Sounds like a good plan to me. Good luck!

What type of plastic are your beakers made of?


I believe they're polystyrene, but I'm having trouble finding the link to confirm.

Interesting. I wasn’t able to find any polystyrene beakers.


I don’t think plastic beakers can be made of polystyrene (for one, they’d be done if you tried to put acetone in them). If I had to make a guess based on what I know about polymers from Forensics, the most likely case is that they’re made from high density polyethylene or polyethylene terephthalate. Polycarbonate is also possible, but less so than one of the other two.
Carmel HS (IN) '16
Purdue BiolE '20
Nationals 2016 ~ 4th place Forensics


Not throwin' away my shot!
MY CABBAGES!

Purdue WL SciOly Exec Board
http://web.ics.purdue.edu/~scienceo/index.html
https://www.facebook.com/purduescioly

MIT and Princeton 2018 Forensics ES
Assassinator #113

Tesel
Exalted Member
Exalted Member
Posts: 159
Joined: January 30th, 2016, 8:03 pm
Division: C
State: MI
Contact:

Re: Thermodynamics B/C

Postby Tesel » December 5th, 2017, 2:56 pm

pikachu4919 wrote:
Alex-RCHS wrote:
Tesel wrote:
I believe they're polystyrene, but I'm having trouble finding the link to confirm.

Interesting. I wasn’t able to find any polystyrene beakers.


I don’t think plastic beakers can be made of polystyrene (for one, they’d be done if you tried to put acetone in them). If I had to make a guess based on what I know about polymers from Forensics, the most likely case is that they’re made from high density polyethylene or polyethylene terephthalate. Polycarbonate is also possible, but less so than one of the other two.


Yeah, I was wrong. The beakers I got had no official specs with regards to material, so your guess is as good as mine. I saw polystyrene when I was looking at something else, and I'm struggling to remember what.
MI Mission Possible State Champions!
2018: Portage/Haslett/Allendale/GVSU/MSU
Chem: 3/4/2/1/8
Hover: 1/2/1/1/6
MatSci: 2/1/2/1/3
Mission: 5/3/1/2/1

User avatar
pikachu4919
Moderator
Moderator
Posts: 509
Joined: December 7th, 2012, 2:30 pm
Division: Grad
State: IN
Location: West [Favorite Fightin' Frenchman!] // H-Town! --> Philly
Contact:

Re: Thermodynamics B/C

Postby pikachu4919 » December 5th, 2017, 10:45 pm

Tesel wrote:
pikachu4919 wrote:
Alex-RCHS wrote:Interesting. I wasn’t able to find any polystyrene beakers.


I don’t think plastic beakers can be made of polystyrene (for one, they’d be done if you tried to put acetone in them). If I had to make a guess based on what I know about polymers from Forensics, the most likely case is that they’re made from high density polyethylene or polyethylene terephthalate. Polycarbonate is also possible, but less so than one of the other two.


Yeah, I was wrong. The beakers I got had no official specs with regards to material, so your guess is as good as mine. I saw polystyrene when I was looking at something else, and I'm struggling to remember what.


Did it have a recycling number on it?
Carmel HS (IN) '16
Purdue BiolE '20
Nationals 2016 ~ 4th place Forensics


Not throwin' away my shot!
MY CABBAGES!

Purdue WL SciOly Exec Board
http://web.ics.purdue.edu/~scienceo/index.html
https://www.facebook.com/purduescioly

MIT and Princeton 2018 Forensics ES
Assassinator #113

Tesel
Exalted Member
Exalted Member
Posts: 159
Joined: January 30th, 2016, 8:03 pm
Division: C
State: MI
Contact:

Re: Thermodynamics B/C

Postby Tesel » December 6th, 2017, 9:59 am

pikachu4919 wrote:
Tesel wrote:
pikachu4919 wrote:
I don’t think plastic beakers can be made of polystyrene (for one, they’d be done if you tried to put acetone in them). If I had to make a guess based on what I know about polymers from Forensics, the most likely case is that they’re made from high density polyethylene or polyethylene terephthalate. Polycarbonate is also possible, but less so than one of the other two.


Yeah, I was wrong. The beakers I got had no official specs with regards to material, so your guess is as good as mine. I saw polystyrene when I was looking at something else, and I'm struggling to remember what.


Did it have a recycling number on it?


I believe they're supposed to ship this afternoon, so I'll check then. Good call!
MI Mission Possible State Champions!
2018: Portage/Haslett/Allendale/GVSU/MSU
Chem: 3/4/2/1/8
Hover: 1/2/1/1/6
MatSci: 2/1/2/1/3
Mission: 5/3/1/2/1

arv101
Member
Member
Posts: 106
Joined: September 29th, 2016, 5:12 pm
Division: B
State: NJ
Contact:

Re: Thermodynamics B/C

Postby arv101 » December 6th, 2017, 3:42 pm

Anyone in the east coast (upper) going to Rustin invitational?
What did the thermometer say to the graduated cylinder?

"You may have graduated, but I have many degrees"

shrewdPanther46
Member
Member
Posts: 400
Joined: October 9th, 2017, 6:25 pm
Division: C
State: NJ
Contact:

Re: Thermodynamics B/C

Postby shrewdPanther46 » December 6th, 2017, 4:49 pm

arv101 wrote:Anyone in the east coast (upper) going to Rustin invitational?

I believe I am. Not sure exactly though...

Anyways, I'm not doing thermodynamics. Good luck (don't screw up) :D
salty

Crtomir
Member
Member
Posts: 147
Joined: April 11th, 2017, 1:24 pm
Division: B
State: OH
Location: Watts Middle School, Centerville, OH
Contact:

Re: Thermodynamics B/C

Postby Crtomir » December 7th, 2017, 6:04 am

Crtomir wrote:With all this talk about aero-gels, most of the ones that are cheap enough are aero-gel beads, not monolithic blocks of aero-gel. A 20x20 cm monolithic block of aero-gel is prohibitively expensive. Filling up a box with aero-gel beads leaves a lot of interstitial space between the beads that is filled with just air. I am wondering if, in the end, aero-gel beads actually work better than just a solid styrofoam block or if, because of the air gaps, the composite system becomes less insulative than just a simple solid styrofoam block? Has anyone taken any real data on this to PROVE that aero-gel beads packed in a box perform better than a solid block of styrofoam?


Anyone have thoughts on this?

Crtomir
Member
Member
Posts: 147
Joined: April 11th, 2017, 1:24 pm
Division: B
State: OH
Location: Watts Middle School, Centerville, OH
Contact:

Re: Thermodynamics B/C

Postby Crtomir » December 7th, 2017, 6:05 am

Another question: ICE WATER BONUS

Is it worth it?

User avatar
kendreaditya
Member
Member
Posts: 99
Joined: March 31st, 2016, 3:28 pm
Division: C
State: PA
Location: Mariana Trench
Contact:

Re: Thermodynamics B/C

Postby kendreaditya » December 7th, 2017, 12:47 pm

in 3e. the rules states that the hole has to be directly above the device. My hole comes in at a angle, is this ok?

User avatar
WhatScience?
Member
Member
Posts: 394
Joined: July 16th, 2017, 4:03 pm
Division: C
State: NJ
Contact:

Re: Thermodynamics B/C

Postby WhatScience? » December 7th, 2017, 5:59 pm

Crtomir wrote:Another question: ICE WATER BONUS

Is it worth it?


I don't really think it is...I am pretty sure that the points you get are minimal and due the possibility of varying temperature in ice water, would become harder to accurately predict..
"When you clean your room, you are increasing the total chaos of the universe" - Hank Green Crash Course (Entropy)

Events 2018

Thermodynamics, Potions and Poisons, Disease Detectives, Optics, and Towers

User avatar
WhatScience?
Member
Member
Posts: 394
Joined: July 16th, 2017, 4:03 pm
Division: C
State: NJ
Contact:

Re: Thermodynamics B/C

Postby WhatScience? » December 7th, 2017, 6:00 pm

Crtomir wrote:
Crtomir wrote:With all this talk about aero-gels, most of the ones that are cheap enough are aero-gel beads, not monolithic blocks of aero-gel. A 20x20 cm monolithic block of aero-gel is prohibitively expensive. Filling up a box with aero-gel beads leaves a lot of interstitial space between the beads that is filled with just air. I am wondering if, in the end, aero-gel beads actually work better than just a solid styrofoam block or if, because of the air gaps, the composite system becomes less insulative than just a simple solid styrofoam block? Has anyone taken any real data on this to PROVE that aero-gel beads packed in a box perform better than a solid block of styrofoam?


Anyone have thoughts on this?


Honestly, my thoughts are don't waste your money on aerogel...with the way the competition is structured, it's not worth it...plenty of other decent insulators out there
"When you clean your room, you are increasing the total chaos of the universe" - Hank Green Crash Course (Entropy)

Events 2018

Thermodynamics, Potions and Poisons, Disease Detectives, Optics, and Towers

arv101
Member
Member
Posts: 106
Joined: September 29th, 2016, 5:12 pm
Division: B
State: NJ
Contact:

Re: Thermodynamics B/C

Postby arv101 » December 7th, 2017, 7:07 pm

shrewdPanther46 wrote:
arv101 wrote:Anyone in the east coast (upper) going to Rustin invitational?

I believe I am. Not sure exactly though...

Anyways, I'm not doing thermodynamics. Good luck (don't screw up) :D

Um okay thanks?
What did the thermometer say to the graduated cylinder?

"You may have graduated, but I have many degrees"

arv101
Member
Member
Posts: 106
Joined: September 29th, 2016, 5:12 pm
Division: B
State: NJ
Contact:

Re: Thermodynamics B/C

Postby arv101 » December 7th, 2017, 7:08 pm

10. Which of the following is not a type of thermodynamic system?
a. Open
b. Insulated
c. Closed
d. isolated

Why is it C and not B ?( This was from a test I found online, did they screw up or am I missing something big)?
What did the thermometer say to the graduated cylinder?

"You may have graduated, but I have many degrees"


Return to “2018 Lab Events”

Who is online

Users browsing this forum: No registered users and 2 guests

cron